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Check Your Fiber Optic Connectors Like A Professional Installer

2008-11-05T05:52:00.000-08:00

What are Fiber Optic Inspection Microscopes?

Fiber optic inspection microscopes are used to inspect the end face of a optical connector or cleaved fiber.

Two types of fiber optic microscopes are popular on the market: fiber optic connector termination inspection and fiber patch panel ferrule inspection.

Magnification levels of fiber scope are available at 200X or 400X for single mode fiber applications, 100X low cost type for multimode applications. The latter is often included in many fiber optic termination tool kits.

What types of flaws or contamination can the microscope see?

With at least 200X magnification you can clearly see scratches, dig, dirt deposit, debris and other contamination on a fiber optic connector.

Desktop video fiber microscope

The typical desktop fiber optic video inspection microscope has a 9" black and white monitor attached to the scope with a 4 feet video cable. So you can place the monitor where it is convenient. Because of its bulk volume, this type of fiber microscope is typically used in production environments and labs. Both 200X and 400X versions are available.

Portable optical fiber scope

This type of microscope with universal adapter is a versatile instrument to inspect fiber optic connectors. They can be used for both multimode and single mode applications. Connectors slide into scope adapter, providing ease of use with or without tripod. 8 degree angle adapter can be used for inspecting angled connectors such as FC/APC, SC/APC, etc. Both 200X and 400X versions are available.

Coaxial Illuminated handheld fiber inspection scope

These low cost microscopes are available in 200x or 400x magnification, and utilize white LED light to provide coaxial illumination to connector end-faces. This method of illumination produces high resolution detail of end face scratches, defects and contamination. It is provided with a universal 2.5mm adapter, with other common connector styles available. These are the natural choice for fiber installation contractors.

Ferrule inspection microscopes

All aforementioned four types of microscopes are for standalone fiber connector inspection. But what about the connectors already installed on patch panels and hardware devices? The ferrule inspection microscopes are the solution.

These video fiber optic microscopes include a handheld LCD display unit and a small, lightweight probe that contains a long-life LED light source and CCD video camera. The probe adapter tip mates with the connector and projects a crisp, clear image of microscopic debris and end-face damage on the LCD display.

Zoom levels of different optical fiber optic microscopes

* 100X
* 150X
* 200X
* 400X

Warnings

* Do not look into a fiber while the system laser is on

* Do not connect a fiberscope while the system laser is on

* Do not touch the end face of the fiber connector

* Lasers used in telecommunication systems are powerful enough to burn contaminants into the fiber end face. Always ensure the laser is turned off while performing the cleaning procedure.

Other special features of popular handheld fiber micrscopes

1. 100X magnification for viewing multimode connectors
2. Includes 2.5 mm connector "Universal Adapter" for FC, ST and SC style connectors
3. Oblique illumination provides good view of ferrule cleanliness and core condition
4. White LED illumination delivers long working life

Did I Choose The Most Cost Effective Porteble Computer ?

2008-11-02T11:52:00.000-08:00

Did I choose the best laptop ?

Keys to choosing the best laptop computer :

Who is theportable computer user? When choosing a laptop computer, it is important to understand who will be using it.., school student, college student, professional businessman ,office worker, etc.

Where will the laptop be used? For big mobile users such as college students and professionals, size, weight and battery life are very important. So when looking over the reviews and relevant specs, keep those factors in mind. The average high school student uses a laptop from room to room in their house, and have loads of access to AC power most of the time. So for these users, the factors listed above may not be as critical.

How will the laptop be used? The more mobile the user, the more durability is needed. Heavy users ie sales reps spend a great deal of time start and shutting down their laptops every day. an average large user will open and shut their laptop computer 6 times a day. Although that may not seem alot of wear and tear, there is also the issue of general handling. Heavy users will be travelling from location to location, in and out of cars,on and off planes etc on a constant basis. This increases the likelihood of damage to the laptop computer, via dropping, bumping and banging, drink spills on the keyboard, etc....

Should I buy a service contract for my laptop? the answer is YES. When you think about carrying around a fragile piece of electronics costing $1000 or more, the price of a typical service contract is a bargain. for a relatively small price £50 per notebook computer, its worth it to for you peace of mind.

How much should I expect to pay for a laptop? It used to be hard to find a quality laptop under £600; however, this is no longer true. There are several companies with great offers, starting around £300. The options / upgrades you select have a large impact in what you can expect to pay. Having a list of what you want in a computer, such as memory, speed, hard drive size, burners, etc..will help when you go shopping. Although online notebook computer manufacturers allow a great deal of customization, the general public are easily serviced with a “off the shelf” standard notebook computer.

What Laptop Brand Should I Select? the worlds your oyster in this respect with the amount of notebook computer manufactures out there,with different colours and sizes its everyones personal choice , I myself find that toshiba have all the features which service my needs.

How to Clean a Printer

2008-10-30T01:51:00.000-07:00

Does your printer have frequent paper jams? Does it put ink where ink shouldn't be? Is the outside of your printer dirty or covered with smudges? If so, it is time to clean your printer.

First, there are some general rules that apply to cleaning just about any electrical device. It is best to turn off the printer before cleaning it. Do not spray water or cleaner on or in the printer. Instead wet the rag with it and clean the printer with the rag.

Different types of printers require different cleaning methods. So if you can get your hands on cleaning instructions for your make and model of printer, do so and follow them. Unfortunately, many manufacturers only make that kind of information available to their licensed technicians. In that case, you are stuck with these instructions, so read on.

Open up your printer and take a look.

If you have an ink jet printer and there is an ink mess inside, clean it up with wet paper towels.

If you have a printer that uses toner either vacuum or blow it out. Some toner, especially color toner, can be harmful to you, so only use a vacuum with a micro-toner filter or blow and run. Figure out where the drum is (it is shiny and larger in diameter than the rollers) and do not touch or scratch it. If you do, the scratches will turn up as marks on every paper that you print and will require that you replace the drum (not a cheap option) to fix it.

Examine the path that the paper takes through the printer. Clean all of the rollers (but on a toner printer, not the drum or rollers near the drum and watch out for the rollers after the drum because they may be hot). It may take some disassembly and/or contorting of your arm to get to some of the rollers. Access is not always easy. The most important rollers to clean are the ones which pick up the paper from the paper bin and transfer it into the printer. If these rollers are dirty or bad, they will cause consistent paper jams.

The rollers are made of either hard plastic or rubber. All of the rollers can be cleaned with water or rubbing alcohol. If the rubber rollers have deposits that you can't get off, you can use harsher cleaners but be careful because those cleaners can damage the plastic rollers and parts.

To clean a roller, wipe across the roller with a wet rag, rotate the roller, and wipe again. Do this until you have worked your way all the way around the roller. Look at the rag. If it has been blackened by the roller, move to a clean part of the rag and clean the roller again.

Once everything is clean on the inside, close it up and clean the outside. Wipe off the case and each of the buttons or knobs. If there are staples or paper clips sitting on it or wedged in the cracks, remove them and throw them away.

Other areas of the printer can be cleaned but to do so, you will have to either get training and special tools or leave it to a trained professional.

Mentoring In IT

2008-10-27T07:47:00.000-07:00

This article is also available as a "The Sniffer Guy" podcast on iTunes.

ATTENTION AMERICAN IT MANAGERS: Within the next decade most of your best people will retire or die. Your senior staffers are baby boomers with twenty years or more of experience in their field. They built the systems: they learned the operating systems as they were created: they know what they know from real life experience that cannot be learned in school. They are also somewhere between their late forties and early sixties. They rose to the top while competing within the largest workforce America has ever seen. When they leave they will take a level of efficiency and expertise with them that will take twenties years to replace.

To make matters worse, the population of appropriately educated Americans coming up behind them is far smaller than the population getting ready to move out. Do the math. Start now. To try to buy that talent later will not only cost you a fortune but you will be competing for a very small population of such individuals, with the entire world.

In this corporate environment where everyone is disposable and so much work is done by contractors so that companies can avoid having to make a commitment to personnel, it is far too easy to miss this growing danger. Business Managers may have learned this—but probably not. However, IT managers usually have not had much exposure to this concept. They live in a world of projects that staff up for the project and then disband. How to you bring up the next crop of leaders in such an environment? This is going to take far too many companies by surprise! But IT is going to be hit much harder than most other departments. I know of no other area of corporate life that is so project oriented. In the IT world, you build a team and disband it a few months later--even when they do outstanding work. All in the name of avoiding long term cost. It also avoids long term success.

There is also an emotional and psychological component to this problem. After the Dot-Bomb debacle, many people with decades of smarts were kicked out due to layoffs, or companies failing, or being eaten by a bigger company that had its own staff. Why do we eat our seed corn? Those that survived are still concerned about it happening again. And it could. It makes them conservative. Possibly even a tiny bit timid and less likely to share their knowledge freely. I don't blame them. Because our corporate mentality is to cut the expensive people and replace them with contractors—that we can easily get rid of when the job is done. What a vote of no confidence! This is considered to be a strategy. OK…I will accept that. It is a strategy. But it is a very short sighted one. Where is the mid-range planning?

So, what do you do? In this article and podcast, let us restrict our focus to Mentoring. Future articles and podcasts will explore other activities that are also proven and available.

Do you have a mentoring plan in place? I don't mean the typical, "oh, we believe in mentoring around here" kind of plan. I mean a thought out purposeful plan whereby you determine which journeyman IT personnel have the potential to grow into those senior roles and have your baby boomer senior staffers truly mentor them to bring them along. I doubt it. It does exist; I know of a few such companies. But it is rare.

Part of the problem for those that want to create a mentoring program is that it is not so simple to identify candidates. Let me help with that. Not everyone is a candidate for mentoring and few people are cut out to be mentors. It's sad but true. Don't spin your wheels and exhaust your enthusiasm backing the wrong plan and/or individuals. You need to have some way to identify in whom you want to invest. And, please understand, it is an investment. You will invest money but not only money. You will invest the time of very busy and critical people. That will hurt a bit—but you don't really have any choice. If you are responsible for future planning in your organization, ignoring this process is irresponsible.

Here is a handy way to help make these determinations. A friend once told me that he had learned in a sales course at IBM, decades ago, about a concept that went something like this—and I may be mangling it so please forgive me. It was not meant for IT or Mentorship purposes, but I have adapted it.

There are four levels of competence. They are listed in order from least capable to most capable in performing their job. Oddly, this does not represent the order in which they are most effective in a mentoring program.

- Unconsciously Incompetent
- Consciously Incompetent
- Consciously Competent
- Unconsciously Competent

UNCONSCIOUSLY INCOMPETENT: This person doesn't know that they don't know. They are not a candidate for this program—but may need help in learning to learn.

A famous story about Thomas Edison says that he used to test fresh new Engineers who wanted to work for him by putting them in a lab with a very unique and oddly shaped glass container. He would tell them to figure out the internal volume of the container. One time he watched a new graduate work out the problem by measuring all the diameters of the odd twists and turns of the glass and carefully making the calculations on his slide rule. When he presented the answer, Edison said, "You got the right answer, but I can't give you the job." The young man asked why and Edison responded by picking up the container, filling it with water and pouring into a graduated beaker, getting the answer in ten seconds. He said, "Son, I am glad you know the answer, but I'm afraid you just don't know the question." The Unconsciously Incompetent person does not know the question.

CONSCIOUSLY INCOMPETENT: This person knows that they don't know and is probably working to get better. They are a junior person with potential. Such an individual bears watching—and possibly a little testing. Don't make it something too hard, but it should be a little scary, something that makes them stretch. See what happens. This is a good candidate to groom for middle management and in future years, senior management.

CONSCIOUSLY COMPENTENT: This is where the high performers stand. They will be in middle to senior management already. These people are two-for-one sales, all by themselves. They are both someone to be seen as a candidate to RECEIVE mentoring—for senior management—and the ideal person to PROVIDE mentoring for the Consciously Incompetent candidate. They have a high level of skill and consistently perform very well.

This person knows what they are doing, and remembers learning how to do it. They are not as capable as the Unconsciously Competent person. Nevertheless, they know what they know and they know how to transfer it to someone else--if they are motivated and are not afraid of losing their own place. If they know that they are part of something stable and long term and can afford to create their replacement—they are who you need. Because that is exactly what you want them to do. You want them to create their own replacement. You want them to bring up someone that will ask management for less, has a longer run in front of them and to know that they are not committing financial suicide by doing so.

Not all people in this category will make good Mentors as communication skills and a desire to teach are critical components to performing well in the role. I know many individuals who are extremely skilled and have the sort of knowledge that is transferable—but who could never serve this role with someone successfully. You need to keep other variables in mind.

- Communication Skills
- A temperament that tends toward explaining what they are doing, rather than keeping things "close to their vest."
- Good people skills

The people that will make the best Mentors are already doing it. They are respected by their peers as someone that is very free with their knowledge. They are just informal about it as there is no real structure. Find those people and give them a mandate, the time and some guidance and they will do a wonderful job for you.

UNCONSCIOUSLY COMPENTENT: The highest level. This person doesn't even know why they are so good anymore. Everything is so effortless that it is unconscious. This is the best you can get and you may only meet a handful of people like this in your career. Don't touch this person! There are two very good reasons why.

1) They are not replaceable or reproducible. They really are unique. Give them whatever they want to keep them doing what they do and don't distract them!

2) The other reason to keep them away from a mentoring program is because they make terrible mentors. They have no idea how they are doing what they are doing. They just do it--better than anyone else. But, they can't teach what they themselves don't really understand. Treat them as the gift that they are and get out of their way. Additionally, the probable failure in their attempt at mentoring will mess with their confidence. You don't want that.

There is a lot written on mentoring techniques, so I will not belabor the point. You, the IT Managers, may not have the authority or sense of security to set up this sort of program. I understand. However, if you want to do it and you have the authority, it isn't really hard to begin. There is a lot of material already in publication about various approaches. This is not a new concept. Available resources will probably not be specifically IT management related, but you can apply their lessons. My goal in this article is not to present something you have never heard of before. Rather, it is to remind you of what you already know--and to demonstrate how critical it has become to use that information.

Projects are also an opportunity. If you allow less capable people to work with more capable people, or more accurately, tag along, relationships can be created. Make the project oriented nature of our industry, which is its greatest weakness in this regard, become a new strength.

How to Clean your Keyboard-Part 2

2008-10-25T09:47:00.000-07:00

When it comes to cleaning your keyboard there are many methods that can be used, some harder and more effective than others.

The easiest method is the Shake Method. It is so easy that you can do it right now. Pick up your keyboard, turn it over being careful not to press any keys, and shake it. See all of that stuff fall out? It is dirtier than you thought, isn't it? You can use one of the following methods to clean it further.

The Blow Method - You can buy cans of pressurized air at the computer department or computer store which are made especially for cleaning your computer. They usually have either a hose and nozzle or a tube extending from the nozzle. Hold the keyboard up vertically (that means that end of the keyboard is up and the other end is down), aim towards the keys and press the button. Keep blowing until all of the debris is blown out. Be sure to get around and in between all of the keys. This can be done with the computer on, but it is better if it is off so that you do not have to worry about pressing the keys and coming up with a page of aaaaaaaaaaaaaaaaaaaaa's.

The Vacuum Method - This is just like the Blow Method except that a vacuum is used instead of a can of pressurized air. It is quite simple. Just turn the vacuum on, pull out the hose, and run the nozzle over the keys. Before doing this make sure your keyboard does not have any loose pop off keys that could be sucked into the vacuum.

The Cotton Ball Method - This can be done in addition to the above methods and in lieu of the following methods. Take a cotton ball or cloth and wet it with rubbing alcohol. It should not be so wet that the alcohol runs down into the cracks of the keyboard. Wipe the tops and sides of the keys.

The Dishwasher Method - I hesitate to tell about this method because there is the possibility that it could fry your keyboard. When I had less experience with computers, I dunked my keyboard in a sink full of water to clean it. It did work afterwards, so I don't doubt those who say this method will not mess up your keyboard, but if it does, don't complain to me. I warned you. If your keyboard is not the standard membrane type of keyboard or if it is on a laptop, do not even think of trying this.

This is how you do it. Unplug the keyboard and place it face down in an empty dishwasher. Do not disassemble the keyboard and do not put it in a dishwasher that has dirty dishes in it. Some say to add soap, some say not to. Run the dishwasher through a regular cycle. Take the keyboard out, shake the water out, and stand it on end until it is completely dry (this may take several days). If it does not work after doing this, it may not be dry. Let it stand another week and try it again. If it still does not work, I warned you.

The Disassembly Method - This is the most thorough method, but it should not be done on laptop keyboards or non-standard non-membrane keyboards.

Turn off the computer and unplug the keyboard. Turn the keyboard upside down. You may want to get two books or short boards to place the keyboard on. Position them so that they hold up the keyboard on the edges when it is turned over. This should leave the keys dangling and not touching the books or the floor. This is especially needed when the keyboard's back is off; otherwise the keys will be lifted out of their position by the floor (or whatever surface it is laying on).

Get a screwdriver and remove all of the screws from the back of the keyboard. Lay the keyboard down on the books and carefully remove the back.

Take everything apart and clean thoroughly. It is better to take the keys out one at a time and clean them so that you do not put them back in the wrong place. Wipe each one down with a wet cloth and then with a dry cloth. Any keys that may be hard to put back in, can be cleaned in place without removing them. Wipe around the keys as they sit in place and blow any debris out with your lungs (using compressed air or a vacuum may upset the keys). If you are really brave, you can remove all of the keys at once and give the frame a good wipe down too.

Do a once over and make sure that you have cleaned everything. Then reassemble it all.

Don't forget the keyboard's cable. Wrap a wet cloth around it and wipe it down. It may have an accumulation of grime that needs to be scrubbed off. Also if any of the letters on the keys have rubbed off, you can use a fine point permanent marker to draw the letter back on the key.

Use these cleaning methods and your keyboard will last a long time and be something you can be proud of.

Symantec Norton Antibot The Latest In Norton Computer Protection Software

2008-10-22T02:46:00.000-07:00

It seems like every other month a new “program” comes along to make our lives that much easier. For example, first we could bookmark favorites, and then RSS feed them, and then came widgets and now “bots” which are robots that do a lot of our computer work for us in the background. Examples of friendly bots are weather bots, game playing bots, instant messaging and my favorites are those on AOL Instant Messenger which do all kinds of functions for me like shop, find movie times and even give updates on the Wall Street Journal.

Unfortunately not all bots were created “equal.” Some are friendly and some are not. The ones that are not friendly can be a form of malware that allows control of your computer to be released, providing hackers with the opportunity to access your information and spread harmful bots to others. This type of computer virus can then be used to spread spam and commit various types of identity theft and other online fraud.

So with new threats to our computers and information, new methods of protection are required. One of the oldest and most well known software protection designers has recently released a new protection program, Symantec Norton AntiBot. This is a software product designed to prevent the hijacking of one’s personal computer by bots and uses the bots on design programs against them, to located and destroy them.

Many people already employ some form of protection on their personal computer, such as increasing the protection level from internet information to “high.” But these cannot detect some of the most recent bot programs and may not be the most efficient means of information protection, especially with the Internet being used more and more frequently for online shopping, ticket purchases, travel and other “high risk” activities.

A more effective method of detecting and eliminating threats caused by bots is to install software designed specifically to detect, destroy and prevent bots from having access to your computer. With Symantec Norton AntiBot software, protection against bots is enhanced several times and the threat of bot attack is greatly diminished. It’s program protects against bots by blocking bots from entering your computer through downloads and e-mail attachments (two of the common ways bots enter a personal computer), checking for any unusual behavior on your personal computer and eliminating it, and detecting malicious bot software at all levels; keeping your personal, financial and credit card information safe and stopping identify theft before it can occur.

Because bots operate in the background and are not detectable by antivirus or antispyware programs, many computer users are completely unaware that their personal computer has become infected. Many problems caused by bots go undetected until it is too late. Warning signs that your computer may have been accessed include: slowness of computer speed and unusual or irrelevant error messages. However, many times com these symptoms are sporadic and computer users will take little notice. Many people will continue to use their personal computer, unaware that bots have hijacked their personal computer and are slowly at work; looking for credit card numbers, passwords, and logon information which can be used for identity theft and in committing other types of online crime. This program scans your personal computer on a continuous basis, closing the gaps that could allow bots to infect your personal computer and better ensuring that bots do not invade and gain control.

The use of Symantec Norton AntiBot to determine what a harmful or useful bot and allows you to continue using those bots you love and have come to depend on for information and services. It can be used in addition to several other antivirus and antispyware programs. Its compatibility is not limited to only Norton products.

The cost of this software is $29.95 for one year of service. It was awarded PC Magazine’s Editor’s Choice Award (2007) and underwent rigorous testing which included using AntiBot on computers with existing threats as well as allowing threats to try to access the computer after installation.

With the growing threat of identity theft and credit card fraud Symantec Norton AntiBot offers an additional level of protection needed to combat the threat of bots and prevent them from turning one’s personal computer into a robotic that turns into an instrument of destruction to both your personal and financial well-being.

Enabling High - Quality C/C++ Software, Automatically-Coverity Prevent

2008-10-19T04:45:00.000-07:00

What Is It?

Coverity Prevent SQS™ is the market-leading automated approach to identify and resolve the most critical defects in C, C++, and Java source code. By providing a complete understanding of your build environment, source code, and development process, Prevent SQS sets the standard in enabling high-quality software across organizations worldwide.

Prevent SQS for C/C++ automatically analyzes large, complex C and C++ code bases and detects critical, must-fix defects that could lead to system crashes, memory corruption, security vulnerabilities, unpredictable behavior, and performance degradation.

Prevent SQS features:

• 100% path coverage: Prevent SQS for C/C++ analyzes 100% of the paths through your source code, ensuring that all possible execution branches are followed, while avoiding impossible paths to maintain fast execution.

• Low false positive rate: Prevent SQS for C/C++ maintains a very low false positive rate , ensuring that developers’ time spent inspecting defects will result in noticeable quality improvements.

• Highly scalable: Prevent SQS for C/C++ analyzes millions of lines of code in a matter of hours, easily integrating into your regular build process with little or no additional hardware and no disruption to your development process.

What Makes It Great?

Unlike other C/C++ analysis tools that focus on programming style and syntax-based checks, Prevent SQS for C/C++ performs deep, interprocedural analysis to uncover the critical, must-fix defects that matter most to developers. Prevent SQS for C/C++ leverages multiple analysis engines to uncover hard-to-find defects including:

• Path Flow Engine understands the control flow through each function in your code base, allowing Prevent SQS to analyze 100% of the paths through your code.

• Statistical Engine tracks behavioral patterns throughout your entire code base, allowing Prevent SQS to infer correct behavior based on previously observed behavior.

• Interprocedural Summary Engine enables Prevent SQS to perform a whole program analysis of complex call chains at any depth across files and modules in a form that is most similar to the eventual executing Binary. This result in the highest-fidelity results available.

• False Path Engine solves each branch condition to determine if it will be true, false, or unknown on the current path. This allows Prevent SQS to efficiently remove obvious false positives from the set of defects reported.

A sample of the critical defects reported by Prevent SQS for C/C++ include:

Concurrency Issues

• Double locks, missing locks.

• Locks acquired in incorrect order.

• Locks held by blocking functions.

Memory Corruption and
Mismanagement

• Resource leaks.

• Calls to freeing functions using invalid arguments.

• Excessive stack use in memory constrained systems.

Crash-causing pointer errors

• Dereference of null pointers.

• Failure to check for null return values.

• Misuse of data contained within wrapper data types.

C++ Specific Errors

• Misuse of STL iterators.

• Failure to de-allocate memory by destructors.

• Incorrect override of virtual functions.

• Uncaught exceptions.

Window/COM Specific Errors

• Incorrect memory allocation with COM interfaces.

• Incorrect type conversions.

Security Vulnerabilities

• Buffer overruns.

• SQL injection.

• Cross-site scripting.

• Integer overflows.

About Coverity

Coverity (http://www.coverity.com) is the market leader in improving software quality and security. Coverity’s groundbreaking technology automates the approach to identifying and resolving critical defects and security vulnerabilities in C/C++ and Java source code. More than 300 leading companies have chosen Coverity Prevent SQS because it scales to tens of millions of lines of code, has the lowest false positive rate in the industry and provides total path coverage. Companies like Ericsson, HP, Samsung, EMC, and Symantec work with Coverity to eliminate security and quality defects from their mission-critical systems.
Coverity also has customers like Symbian, RIM (Blackberry), Juniper networks, Cisco, Texas instruments and is also used by the Department of Homeland security to scan lots of open source projects.

Free trial

Coverity offers a free trial of Prevent SQS that will detect a wide range of crash-causing defects in your code base within hours. No changes to your code are necessary, there are no limitations on code size, and you will receive a complimentary report detailing actionable analysis results. Register for the on-site evaluation at: http://www.coverity.com .

How to Clean your Keyboard- Part 1

2008-10-17T11:44:00.000-07:00

I know most of you will not heed this advice, but KEYBOARDS CAN MAKE YOU SICK (how's that for tactfulness?). Germs live on your hands and fingers. When you type, many of them jump on to the keyboard. When someone else types on your keyboard, those germs transfer to their fingers. Or when you later type on the same keyboard, those germs reconquer your fingers. Regularly disinfecting the keyboard can prevent this.

To disinfect the keyboard, turn off the computer. Then spray disinfectant on a cloth. Be sure to use disinfectant and not just any type of cleaner because not all cleaners disinfect. Also do not spray the disinfectent directly on the keys. Spray it on the cloth. Wipe down the top and sides of the keys. Give the keys a few minutes to dry off before turning the computer back on.

Now that you know how to do it, you should make it a regular practice to disinfect the keyboard. It's one step towards a healthier you.

So you have your keyboard disinfected and life is great. Then your child spills koolaide all over it. What do you do? There are certain steps that you should take when something, like pop, beer, wine, coffee, milk, or kool-aide, is spilled on the keyboard.

The first thing to do is immediately unplug the keyboard from the back of the computer and turn the keyboard over so that its keys are down. This will allow the liquid to drain out. You will probably want to put a cloth under the keyboard or at least make sure that the surface you have put it on is washable.

Then use the mouse to shut down Windows and turn off the computer (this is important because later you will have to plug the keyboard back into the computer and you should never plug any device into a computer while it is on).

While the keyboard is upside down use a cloth to dry as much of the liquid off as you can. If you have a can of compressed air or a vacuum, while the keyboard is upside down blow or vacuum it out. Then let the keyboard set upside down for at least a night so that it can adequately dry out.

If the liquid that spilled on it was sticky, you may want to follow the extensive cleaning procedure explained in the next article, How to Clean your Keyboard - Part 2.

Liquid spilled on a laptop keyboard can easily reach the hard drive, so turn it over immediately and leave it in that position until it dries.

Keyboards are quite resilient and so it should work when you turn it on again. But if not, another attribute of keyboards is that they are cheap and so it won't cost too much to buy another one.

With these pointers in mind and a quick reaction, you just may save your keyboard from total destruction the next time it gets coated with coffee.

Game Development - Story Bible Example

2008-10-15T08:43:00.000-07:00

The bible deals exclusively with story and its elements. While the design document guides the creation of the entire gaming experience, the bible controls the game’s interactive screenplay.

Log Line

Let’s say we’re working on a game titled “Hangnail,” the latest game inspired by Quake. Hangnail’s bible would include a “treatment” or synopsis of the game’s story. That treatment should include one- or two-sentence reviews of the story’s beginning, middle, and end. In some cases, the treatment could go into greater detail, stretching from one page to 20 or more, if the designer or game writer chose to really flesh out the story in the design stage. If the game’s narrative is truly based on cinematic story construction, the story might include first, second, and third act reviews. Leave those bits to your writer—we waste hours worrying about that act-structure nonsense. At the very least, the synopsis should include a “log line,” or a brief review of the game’s story, like this:

Hangnail:

Synopsis: A big, tough guy with heaps of muscles and a heart of gold walks through mazes and kills lots of stuff to battle evil, find his boxed lunch, and save the future of humanity…at least until the sequel comes out.

Characters

The second portion of the bible would include character reviews. The most important component of any effective narrative, whether it’s in a game, a movie, a TV show, or a novel, is good characters. They should have well-rounded histories and solid motivations. Most importantly, they should be clearly drawn out so anyone who reads the bible or works on the game sees the same person in their minds. If a writer or designer creates a game revolving around a Schwarzenegger-type action hero and fail to describe his all-American, psychopathic personality, the artist or renderer could end up drawing Marv Albert. Here’s what our character bible would say about Hangnail’s protagonist:

Character Name: Dirk Squarejaw

Age: Late 20s

Appearance: Ruggedly handsome and in the kind of impossibly good shape that you’d need to spend 25 hours a day in a gym to achieve.

Equipment: Death Ray of Death, Grenade of Severe Owies, Swiss Army Knife of Animosity, Pulse Cannon of Mild Mood Swings.

Attributes: Wonderfully and relentlessly violent. With an overdeveloped sense of honor. Dedicated to saving all life on Earth, or at least all attractive women on Earth. He enjoys painting in splattered blood, rainy days, long walks on the beach, thermonuclear devices, and backgammon.

Background: Orphaned at birth and raised by wolves, Dirk was rescued by nuns at the age of 4. The nuns instilled in the young Dirk his sense of honor and his bizarre obsession with backgammon. When the evil villain, General Payne, destroyed the nuns’ village to hijack all their dice, Dirk set out on his lifelong quest to end evil around the world. He will never rest until Payne is defeated, peace and justice restored, and double sixes rolled everywhere.

All the information in the character description above could be distilled into one long paragraph entry, if the designer chooses to limit the length or the scope of the bible. However, every character in the game (even supporting players) should be presented in this same detail.

Such enriching character sketches can provide inspiration when planning game maps or missions (depending on the game’s genre). For example, in Hangnail’s case, given Dirk’s devotion to backgammon, the designer could construct a maze or a level in which the objective is to slaughter all of General’s Payne’s agents to recover their ill-gotten dice.

Character description and background is one area where a story bible can really enrich an interactive game. If the bible can draw out a game’s central character with convincing depth and detail, the production can present an interesting and exciting person around which you can build a game and story.

In some cases, the player becomes that character. In other games, the player merely guides an already existing character. In either case, the story bible can outline what the main characters wants! That’s the key. The entire game story should be built around what the main character or hero wants and needs. Once that is pinpointed (be it the damsel in distress, a magic amulet, or the enemy capital), a designer can build an entire game around that quest. Battles in the cold reaches of space. Races through monster-filled mazes. Puzzle-solving through a haunted library. Anything that makes the game more entertaining can stand between the hero and the goal. But, the goal must be clear, ever-present, and motivated. The story bible can help a design team do that.

In another example, if Dirk was scared of water because his wolf parents couldn’t swim, the designer might wish to create an underwater level and cause Dirk’s air supply to disappear quickly because he hyperventilates too easily.

Using a methodology like this, in which you define the background, attributes, age, appearance, and equipment of a character, can help ensure truly motivated and enjoyable characters and gives the design team ideas for gameplay. A game’s characters need to be compelling. If the player becomes a hero in the game, that hero must be attractive enough that the player wants to assume that persona. A game villain should be rotten enough that the player generates genuine passion and satisfaction from defeating him or her.

An essential rule of thumb states that every character, even the most incredibly butch of heroes, needs to have weaknesses or shortcomings. If a character seems too omnipotent and has every skill imaginable down pat, no player will believe he or she could possibly lose or die. You don’t have to make your hero or heroine a simpering wimp, but don’t make them invulnerable. Even Superman has his kryptonite.

In the final document, Dirk’s bible entry might include an artist’s sketch (if created early in the game development process) or a 3D rendering (if created farther along in the development process) which might also be the actual avatar used in the game if the product makes it that far along.

To digress for just a moment, I have approached the use of game bibles for story development solely from the perspective of the hero thus far. Lately, games such as Bullfrog’s Dungeon Keeper and LucasArts’ Dark Forces II have made it possible for players to assume the role of the villain. However, that doesn’t turn the narrative rule on its ear—the same guidelines still apply. A villain also has wants and needs. In the best possible scenario, the bad guy wants exactly the same thing as the hero. In drama and writing courses, that’s called the “Law of Conflicting Need.” A good story (and therefore a good game, if it has story components) has a protagonist and an antagonist wanting the same thing for perfectly opposite reasons. We usually want the hero to get to that goal before the villain. However, in games where we become the villain, we assume the motivations of the villain. The bible should outline the history, personality, and motivation of the bad guy as well as the hero. That way, if we become the antagonist in gameplay, it works just as well if we had chosen the hero’s role.

Resource:
http://www.computer-game-design.com

Complete Overview of Linux

2008-10-13T08:42:00.000-07:00

This article will discuss the differences between the Linux and Windows operating software’s; we discuss some of the pro’s and con’s of each system.

Let us first start out with a general overview of the Linux operating system. Linux at its most basic form is a computer kernel. The Kernel is the underlying computer code, used to communicate with hardware, and other system software, it also runs all of the basic functions of the computer.

The Linux Kernel is an operating system, which runs on a wide variety of hardware and for a variety of purposes. Linux is capable of running on devices as simple as a wrist watch, or a cell phone, but it can also run on a home computer using, for example Intel, or AMD processors, and its even capable of running on high end servers using Sun Sparc CPU’s or IBM power PC processors. Some Linux distro’s can only run one processor, while others can run many at once.

Common uses for Linux include that of a home desktop computing system, or more commonly for a server application, such as use as a web server, or mail server. You can even use Linux as a dedicated firewall to help protect other machines that are on the same network.

A programmer student named Linus Torvalds first made Linux as a variant of the Unix operating system in 1991. Linus Torvalds made Linux open source with the GNU (GPL) (General Public License), so other programmers could download the source code free of charge and alter it any way they see fit. Thousands of coders throughout the world began downloading and altering the source code of Linux, applying patches, and bug fixes, and other improvements, to make the OS better and better. Over the years Linux has gone from a simple text based clone of Unix, to a powerful operating software, with full-featured desktop environments, and unprecedented portability, and a variety of uses. Most of the original Unix code has also been gradually written out of Linux over the years.

As a result of Linux being open source software, there is no one version of Linux; instead there are many different versions or distributions of Linux, that are suited for a variety of different users and task. Some Distributions of Linux include Gentoo, and Slackware, which due to the lack of a complete graphical environment is best, suited for Linux experts, programmers, and other users that know their way around a command prompt. Distributions that lack a graphical environment are best suited for older computers lacking the processing power necessary to process graphics, or for computers performing processor intensive task, where it is desirable to have all of the system resources focused on the task at hand, rather than wasting resources by processing graphics. Other Linux distributions aim at making the computing experience as easy as possible. Distributions such as Ubuntu, or Linspire make Linux far easier to use, by offering full-featured graphical environments that help eliminate the need for a command prompt. Of course the downside of ease of use is less configurability, and wasted system resources on graphics processing. Other distributions such as Suse try to find a common ground between ease of use and configurability.

“Linux has two parts, they include the Kernel mentioned previously, and in most circumstances it will also include a graphical user interface, which runs atop the Kernel” reference #3. In most cases the user will communicate with the computer via the graphical user interface.

(ref #6) Some of the more common graphical environments that can run on Linux include the following. The KDE GUI (Graphical user interface). Matthias Ettrich developed KDE in 1996. He wanted a GUI for the Unix desktop that would make all of the applications look and feel alike. He also wanted a desktop environment for Unix that would be easier to use than the ones available at the time. KDE is a free open source project, with millions of coders working on it throughout the world, but it also has some commercial support from companies such as Novell, Troltech, and Mandriva. KDE aims to make an easy to use desktop environment without sacrificing configurability. Windows users might note that KDE has a similar look to Windows. Another popular GUI is (ref #7) GNOME. GNOME puts a heavy emphasis on simplicity, and user ability. Much like KDE GNOME is open source and is free to download. One notable feature of GNOME is the fact that it supports many different languages; GNOME supports over 100 different languages. Gnome is license under the LGPL license (lesser general public license). The license allows applications written for GNOME to use a much wider set of licenses, including some commercial applications. The name GNOME stands for GNU Network object model environment. GNOME’s look and feel is similar to that of other desktop environments. Fluxbox is another example of a Linux GUI. With less of an emphasis on ease of use and eye candy, Fluxbox aims to be a very lightweight, and a more efficient user of system resources. The interface has only a taskbar and a menu bar, which is accessed by right clicking over the desktop. Fluxbox is most popular for use with older computers that have a limited abundance of system resources.

Although most Linux distributions offer a graphical environment, to simplify the user experience, they all also offer a way for more technically involved users to directly communicate with the Kernel via a shell or command line. The command line allows you to run the computer without a GUI, by executing commands from a text-based interface. An advantage of using the command prompt is it uses less system resources and enables your computer to focus more of its energy on the task at hand. Examples of commands include the cd command for changing your directory, or the halt command for shutting down your system, or the reboot command for restarting the computer ect.

Now that we are more familiar with the Linux operating system, we can note the many ways in which Linux differs from the worlds most popular OS, Microsoft Windows. From this point forward we will discuss some of the more prominent ways in which Linux deferrers from Windows.

For starters there is only one company that releases a Windows operating system, and that company is Microsoft. All versions of Windows, weather Windows XP Home, Business, or Vista, all updates, security patches, and service patches for Windows comes from Microsoft. With Linux on the other hand there is not one company that releases it. Linux has millions of coders and companies throughout the world, volunteering their time to work on patches, updates, newer versions, and software applications. Although some companies, charge for TECH support, and others charge for their distribution of Linux, by packaging it with non-free software, you will always be able to get the Linux Kernel for free, and you can get full-featured Linux desktops with all the necessary applications for general use, for free as well. The vendors that charge money for their distribution of Linux are also required to release a free version in order to comply with the GPL License agreement. With Microsoft Windows on the other hand you have to pay Microsoft for the software, and you will also have to pay for most of the applications that you will use.

Windows and Linux also differ on TECH support issues. Windows is backed by the Microsoft Corporation, which means that if you have an issue with any of their products the company should resolve it. For example if Microsoft Windows is not working right, then you should be able to call Microsoft and make use of their TECH support to fix the issue. TECH support is usually included with the purchase of the product for a certain amount of time, maybe a two year period, and from there on you may be charged for the service. Although IBM backs their Linux products, for the most part if you use Linux you are on your own. If you have a problem with Ubuntu Linux you cannot call Ubuntu and expect any help. Despite the lack of professional help, you can however receive good TECH advice, from the thousands or millions of Linux forums that are on the web. You ca also get great help from social networking sites such as Myspace, by posting questions in the many Linux groups. You can usually receive responses for your questions in a matter of hours form many qualified people.

Configurability is another key difference between the two operating software’s. Although Windows offers its control panel to help users configure the computer to their liking, it does not match the configuring options that Linux provides especially if you are a real TECH savvy user. In Linux the Kernel is open source, so if you have the know how, you can modify it in virtually any way that you see fit. Also Linux offers a variety of Graphical environments to further suit your needs. As mentioned earlier Linux is capable of running full-featured graphical environments like KDE, or more lightweight and resource friendly GUI’s like Fluxbox, or Blackbox, to suit users with older computers. There are also versions of Linux that are designed to emulate the Windows look and feel as closely as possible. Distributions such as Linspire are best suited for users that are migrating over from the Windows world. There are also distributions that include no graphical environment at all to better suit users that need to squeeze out all of the computing power that they can get for various computing activities, and for users that are more advanced than others. All of this configurability can be problematic sometimes, as you will have to make a decision on which desktop is right for you, and to make things easier on yourself you will need to only install applications that are native to your distribution and graphical environment.

(ref #1) The cost effectiveness of Linux is another way it separates itself from Windows. For home use Linux is cheap and in most cases completely free, while Windows varies in cost depending on which version you buy. With Linux most of the applications will also be free, however for Windows in the majority of cases you are suppose to pay for the applications. For most cases, with Linux there is no need to enter a product activation key when performing an installation, you are free to install it on as many computers as you’d like. With Windows you are only allowed to install it on one computer and Microsoft uses product activation software to enforce this rule. When installing Window’s you must enter a product activation key, which will expire after so many uses. If you wish too, you can purchase Linux from a variety of vendors, which will include a boxed set of CDs, Manuals, and TECH support for around 40-130$. Of course If you purchase a high-end version of Linux used for servers it may cost any where from 400$- 2000$. “In 2002 computer world magazine quoted the chief technology architect at Merrill Lynch in New York, as saying “the cost of running Linux is typically a tenth of the cost of running Unix or Windows alternatively.” (ref#1)

(ref #1) Installation of Windows is generally easier, than installing Linux. “With Windows XP there are three main ways to install. There is a clean install, in which you install Windows on a blank hard drive. There is also an upgrade install, in which you start with an older version of Windows and “upgrade” to a newer one. An advantage of upgrading is that all of the files on the older system should remain intact throughout the process. You can also perform a repair install, in which case you are installing the same version of Windows on top of itself in order to fix a damaged version of Windows. There is also a recovery, which Technically is not an install; it is used to restore a copy of Windows back to its factory settings. The disadvantage of recovering Windows is the fact that you will loose all of your data, which resides on the damaged copy of Windows.” (ref#1) Also with Windows you can rest assured that your hardware will most likely be supported by the operating software, although this is not much of a problem with Linux you cant be sure if Linux will support all of your hardware. With Linux installation varies greatly from Distro to Distro. You may be presented with a graphical installer or it may be a text-based installer, these variations make Linux a bit more difficult and unpredictable to install than is Windows, (although the difficulty is disappearing). You may perform a clean install of Linux or dual boot it, to co-exist with another operation software. With Linux rather than having to buy an upgrade Cd, you can install updates by downloading and then installing them while your desktop is running. With Linux it is also not necessary to reboot your computer after most upgrades, It is only necessary to reboot after an upgrade to the kernel. It is also possible to run Linux without ever needing to install it on a hard drive; there are many distributions of Linux that will allow you to run it straight off of a live cd. The advantage of this is that you do not need to alter your system in order to

try Linux. You can run Linux off of the CD so you do not have to damage your Windows partition. Other advantages include the ability to rescue a broken Linux system. If your Linux computer will not boot, then you may insert a live cd and boot off it, so you can repair the damaged version of Linux. Also you may use a Linux live cd to recover files from a damaged Windows computer that will no longer boot up. Since Linux is capable of reading NTFS files you may copy files form a Windows computer to a USB flash drive or floppy drive ect.

Another major difference between Linux and Windows is the applications that you will use with either OS. Windows includes a much wider abundance of commercially backed applications than does Linux. It is much easier to find the software that you are looking for with Windows than it is with Linux, because so many software vendors make their products compatible with Windows only. With Linux you will for the most part be forced to let go of the familiar applications that you have grown accustomed to with Windows, in favor of lesser-known open source apps that are made for Linux. Applications such as Microsoft office, Outlook, Internet Explorer, Adobe Creative suite, and chat clients such as MSN messenger, do not work natively with Linux. Although with Linux you can get Microsoft office and Adobe creative suite to work using software from codeWeavers called cross Over Office. Instead of using these applications you will need to use Linux apps such as open office, The Gimp Image Editor, The ThunderBird email client, Instead of the MSN messenger you can use the GAIM messenger, and you can use Firefox as your web browser. Also with Linux it can be difficult to install software even if it is made for Linux. This is due to the fact that Linux has so many different versions. Software that is made to install on one version probably will require some configuration in order to install on another version. An example would be if you were trying to install software that was made for the KDE graphical environment, on the GNOME GUI, This app would not easily install on the GNOME GUI, and would require some configuring on your part to successfully install it.

The type of hard ware that Linux and windows runs on also causes them to differ. Linux will run on many different hardware platforms, from Intel and AMD chips, to computers running IBM power Pc processors. Linux will run on the slowest 386 machines to the biggest mainframes on the planet, newer versions of Windows will not run on the same amount of hardware as Linux. Linux can even be configured to run on apples, Ipod’s, or smart phones. A disadvantage of Linux is when it comes to using hardware devices such as Printers, Scanners, or Digital camera’s. Where as the driver software for these devices will often be easily available for Windows, with Linux you are for the most part left on your own to find drivers for these devices. Most Linux users will find comfort in the fact that drivers for the latest hardware are constantly being written by coders throughout the world and are usually very quickly made available.

(ref #1) One of the most notable differences between the two operating software’s is Windows legendary problems with malicious code, known as Viruses and Spy ware. Viruses, Spy-ware and a general lack of security are the biggest problems facing the Windows community. Under Windows Viruses and Spy-ware have the ability to execute themselves with little or no input from the user. This makes guarding against them a constant concern for any Windows user. Windows users are forced to employ third party anti virus software to help limit the possibility of the computer being rendered useless by malicious code. Anti virus software often has the negative side effect of hogging system resources, thus slowing down your entire computer, also most anti virus software requires that you pay a subscription service, and that you constantly download updates in order to stay ahead of the intruders. With Linux on the other hand problems with viruses are practically non-existent, and in reality you do not even need virus protection for your Linux machine. One reason why Viruses and Spy-ware are not a problem for Linux is simply due to the fact that there are far fewer being made for Linux. A more important reason is that running a virus on a Linux machine is more difficult and requires a lot more input from the user. With Windows you may accidentally run and execute a virus, by opening an email attachment, or by double clicking on a file that contains malicious code. However with Linux a virus would need to run in the terminal, which requires the user to give the file execute permissions, and then open it in the terminal. And in order to cause any real damage to the system the user would have to log in as root, by typing a user name and password before running the virus. Foe example to run a virus that is embedded in an email attachment the user would have to, open the attachment, then save it, then right click the file and chose properties form the menu, in properties they can give it execute permissions, they would then be able to

open the file in the terminal to run the virus. And even then the user would only be able to damage his or her home folder, all other users data will be left untouched, and all root system files would also remain untouched, because Linux would require a root password to make changes to these files. The only way the user can damage the whole computer would be if he or she logged in as root user by providing the root user name and password to the terminal before running the virus. Unlike Windows in Linux an executable file cannot run automatically, It needs to be given execute permissions manually this significantly improves security. In Linux the only realistic reason you would need virus protection is if you share files with Windows users, and that is to protect them not you, so you are not to accidentally pass a virus to the Windows computer that you are sharing files with.

The above was a general over view of some differences between the Windows operating system, and Linux. To recap we started with the fact that Windows has only one vendor that releases the software, while Linux comes from millions of different coders throughout the world. We also commented on the fact that the Linux Kernel and much of the applications used with it are completely free of charge, where as with windows you are forced to pay for most of the software. Unlike Widows Linux is often lacking in professional Tech support, and Linux users are often left on their own to solve Technical issues. Linux users can either pay for Tech support or rely on the many Linux Forums and groups available on the Internet. Due to the fact that the kernel is open source, Linux has a huge advantage over Windows in configurability. You can configure Linux to run almost any way you see fit by manipulating the Kernel. Installing the Windows Operating software and applications is easier due to the fact that it has a universal installer. Also finding applications for Windows is easier because of its popularity most apps are available for Windows only, and are made easily available. Linux will run on a greater variety of hard ware than does Windows, from mainframe super computers running multiple IBM Power PC Chips, to a small laptop running an AMD processor. And of course the biggest difference in this writer’s opinion is the fact that Linux does not suffer from an onslaught of Viruses and other malicious code, unlike Windows which is plagued by countless number of malicious code that can easily destroy your system if not properly guarded against.

In conclusion we will conclude that the Linux OS really is the superior software. Other than a few minor nuisances, linux out performs Windows in most categories. The fact that Linux is more secure is the tipping point, that tilts the scales in the favor of Linux. Windows simply suffers from far to many security vulnerabilities for it to be considered the better over all desktop environment.

References

http://www.michaelhorowitz.com/Linux.vs.Windows.html Reference #1

http://www.theinquirer.net/en/inquirer/news/2004/10/27/linux-more-secure-than-windows-says-study Reference #2

http://www.linux.com/whatislinux/ reference number 3

http://www.linux.org/info/

Reference #4

http://en.wikipedia.org/wiki/Linux%5Fkernel Reference #5

http://en.wikipedia.org/wiki/KDE Reference #6

http://en.wikipedia.org/wiki/GNOME Reference #7

CCNA, CCENT, Network+, And Security+ Practice Questions: TCP, UDP, Smurf Attacks, And More!

2008-10-12T16:41:00.000-07:00

Let’s test your knowledge of UDP, TCP, smurf attacks, EIGRP, and more with these questions designed to help you prepare for success on your CCENT, CCNA, CCNP, Network+, and Security+ certification exams!

CCENT Certification / Network+ Certification:

Which of the following protocols runs on both UDP and TCP?

A. DHCP

B. SNMP

C. DNS

D. ARP

E. Inverse ARP

Answer: C. DNS runs on port 53, both on TCP and UDP.

Security+ Certification:

Briefly define the term "smurf attack". (Not too briefly, though!)

Answer: Basically, a smurf attack involves sends ICMP Echo packets (pings) with the intended victim's IP address specified as the source of the Echo packets. This transmission takes the form of a directed broadcast, which means that quite a few hosts can receive it - and then respond with ICMP Echo Replies, which will all be sent to the intended victim.

CCNA Exam:

R1 and R3 are directly connected at their respective Serial1 interfaces via a DTE/DCE cable. What command will tell you whether the interface is connected to the DTE or DCE end of the cable?

Answer: Run show controller serial 1 on either router - the DTE / DCE information is near the top of the output.

CCNP Certification / BSCI Exam:

DUAL has discovered four possible paths to a remote network, with the following metrics: PathA, 1500. PathB, 1500. PathC, 2600. PathD, 3100. What command will allow EIGRP to use the first three paths without using the fourth?

Answer: variance 2 would do the job. Any path with a metric of 3000 or lower will be utilized; setting it to 3 would bring PathD into the equation.

CCNP Certification / BCMSN Exam:

What is the main purpose of IEEE 802.3ac?

Answer: The IEEE 802.3ac standard allows the maximum frame length to be extended to 1522 bytes, which means the dot1q 4-byte header doesn't cause problems in transmission.

CCNP Certification / ONT Exam:

Which queueing strategy gives priority to interactive, low-bandwidth communications by default?

Answer: Weighted Fair Queueing (WFQ) gives priority to interactive, low-bandwidth conversations, and then splits the remaining bandwidth fairly among the remaining conversations.

Look for a new set of Cisco and CompTIA certification exam questions soon!

5 Tips to Organize your Server Room in 2008

2008-10-10T11:40:00.000-07:00

If you are looking to get your server room organized in 2008, there are a few key steps to keep in mind while you are going through the process. Your server room houses valuable information for your business and the safety and security of your equipment should be of top concern. In addition, the equipment that you choose should be efficient and safe for long term use.

1. Choose the Appropriately Sized Rack

As you are looking to organize your server room, the most logical place to start is by choosing new server racks. Select server racks with sufficient internal space to house all of your current equipment and room to accommodate future expansion. Having extra space is a must in your server room for expansion as well as unplanned additional equipment purchases. Some obvious things to check as well include determining that you have enough space to move the new servers in and that you have the proper floor space to maneuver around the equipment and that there is enough space in between the equipment to allow for safety spacing. When you are installing the equipment, be sure to install it according to the included instructions so that you do not have any future problems.

2. Include your New Server Room in your Security Strategy

Security, especially with vital information, is always important for a business to consider. As you are organizing your server room, be sure that any changes or additions fit into your overall business security plan. You may want to consider purchasing server racks that have locking doors, minimizing personnel access to the room and using monitor devices within the room for added protection. In addition, newer technology allows you to monitor the environment of the server room at all times. Temperature changes, water leaks, electrical circuit issues and other issues can change unknowingly, causing potential damage to your server room. With the addition of this technology, you will be able to act quickly to resolve any issues in order to protect your valuable equipment.

3. Customize your Server Rack Design

Once you have decided on a manufacturer for your server racks, most will allow for customization. Consider the addition or modification of the shelving, top or side panels, mounting rails and the feet to create a server room that matches all of your business needs and the space that you are utilizing as your server room.

4. Evaluate your Power Technology

Power technology is constantly updated, providing you with various options for your power strip. You have several choices to consider including rack mount power strips, remote power products, Three-phase power technology and standard power strips. Consider your space, the number of outlets that you will need, each plug’s requirements and any redundancy requirements when you are choosing the power technology for your server room.

5. Ensure your Safety with a Cooling Strategy

The heat that each unit gives off varies, making the cooling needs within your server room vary as well. Evaluate all of your requirements and the available cooling strategies to ensure the overall safety of the equipment, environment and company when making your selections.

Cisco CCNA, CCENT, CCNP, And CompTIA Questions: HSRP, OSPF Cost, Route Summarization, And More!

2008-10-08T08:40:00.000-07:00

Let's test your knowledge of important CCNA, CCENT, CCNP, and Network+ exam topics!

CCNA Certification:

The term used for an OSPF path metric is ____________ .

Extra credit: What formula does OSPF use to calculate that metric?

Answer: OSPF's metric is referred to as cost, and the calculation is 100,000,000 / interface speed in bps.

Cisco CCENT / CompTIA Network+ Question:

Which of the following do TCP and UDP headers have in common?

A. sequence number

B. source port

C. source IP address

D. window

E. destination port

F. destination IP address

G. ACK bit

H. reset bit

Answer: B, E. In addition to the source port and destination port numbers, the UDP and TCP headers also have a checksum field in common.

CCNP Certification / BSCI Exam:

In ISIS, what is the most efficient point of a network at which to perform route summarization?

A. An L1 router.

B. An L2 router.

C. An L1/L2 router.

D. A DIS router.

Answer: C. L1/L2 routers are area boundary routers in ISIS, and this is the most efficient point at which to configure route summarization

CCNP Certification / BCMSN Exam:

Short answer: An HSRP router is the primary router and it has a priority of 100. Another router comes online in the same group and it has a priority of 107. Does the new router become the primary? If so, why? If not, what additional configuration is needed to make it the primary?

Answer. By default, the new router with the higher priority will not become the primary router. To allow a router with a higher priority to take over the role of HSRP primary from an existing and normally functioning primary, the preempt option must be configured on the router with the higher priority.

Let's use a two-router HSRP deployment as an example. R2 is the standby, R3 is the primary ("active"), and both have an HSRP priority of 100. Raising R2's priority to 150 does not automatically make it the primary, as shown below.

R2(config)#interface ethernet0

R2(config-if)#standby 5 priority 150

R2#show standby

Ethernet0 - Group 5

Local state is Standby, priority 150

Hellotime 4 sec, holdtime 12 sec Next hello sent in 0.896

Virtual IP address is 172.12.23.10 configured

Active router is 172.12.23.3, priority 100 expires in 8.072

Standby router is local 1 state changes, last state change 00:14:24

R2 now has a higher priority, but R3 is still the active router. R2 will not take over as the HSRP primary until R3 goes down - OR the preempt option is configured on R2.

R2(config-if)#standby 5 priority 150 preempt

1d11h: %STANDBY-6-STATECHANGE: Ethernet0 Group 5 state Standby -> Active

R2#show standby

Ethernet0 - Group 5

Local state is Active, priority 150, may preempt

Hellotime 4 sec, holdtime 12 sec Next hello sent in 1.844

Virtual IP address is 172.12.23.10 configured

Active router is local

Standby router is 172.12.23.3 expires in 10.204

Virtual mac address is 0000.0c07.ac05 2 state changes, last state change 00:00:13

That's enough for today! Look for more free Cisco and CompTIA certification exam questions on this website soon! A+ certification and Microsoft Vista certification practice questions are on the way as well!

What Is A Fiber Optic Continuity Tester? Fiber Optic Technology Tutorial Series Two

2008-10-05T06:39:00.000-07:00

What is a fiber optic continuity tester?

Fiber continuity tester is also called fiber optic continuity checker. It is the simplest visual test of a fiber optic cable link.

To function properly, a fiber optic cable link must be "continuous", meaning no breakage, either within the fiber cable or in the fiber connectors, should exist. The simplest and least expensive way to check is to inject some visual light into one fiber end and check the light coming out from the other end.

To perform this task, two types of fiber testers are available: a fiber optic continuity tester or a laser visual fault locator.

Differences between a fiber continuity tester and a laser visual fault locator

The most important difference is their light source. A fiber continuity tester typically uses a red or green color high intensity LED while a laser visual fault locator uses red color semiconductor laser.

Visible lasers produce a more powerful light and can provide more information to the technician than a LED light. By coupling the fiber link to a visible laser, problems with connectors, breaks in the fiber near connectors or splices, and some bend radius violations can be located.

On the other hand, LED powered fiber continuity tester can only verify that light can travel through the fiber link and no more information is obtained. Fiber continuity tester simply yields a "no go" result. If the light isn't visible at the other end of the fiber link, then the fiber is unusable in its present state and requires further testing and repair.

Applications of a fiber continuity tester

Its best application is testing fiber on a reel before you pull it to make sure it hasn't been damaged during shipment. Look for visible signs of damage (like cracked or broken reels, kinks in the cable, etc.)

The other good application is to check fiber patch cables at patch panels. When connecting fiber cables at patch panels, use the fiber optic continuity tester to make sure each connection is the right two fibers!

And to make certain the proper fibers are connected to the transmitter and receiver, use the continuity tester in place of the transmitter and your eye instead of the receiver.

Understanding the features of a fiber continuity tester

1.Fiber mode compatibility

Some fiber continuity testers only support multimode fibers while the others support both single mode fibers and multimode fibers. So it's best to check the spec sheet from manufacturers to choose the type you need.

2.Fiber connectors supported

Most fiber continuity testers have adapters available for testing 2.5mm ferrule connectors such as ST, SC and FC, 1.25mm ferrule connectors such as LC, MU and special types such as SMA connectors.

3.Fiber distance

Most fiber continuity testers have enough light power to support 2km on multimode fibers.

The fiber optic continuity tester makes it easy to trace fiber optic cable runs.

Compared to laser and incandescent light source testers, this low-cost unit is safer to use and easier for the eye to locate.

This unit has bright red light source which is focused into the fiber optic cable. A multi-use coupler enables connection to ST, SC, FC, RSD and FSD without additional adapters or cables.

How To clean your Case

2008-10-03T10:38:00.000-07:00

There is nothing wrong with leaving spills, dirt, and stains on your computer case. After all isn't that what the case is for, to protect the electronic components inside from spills and dirt? This is true, but there are still parts of the case that need to be cleaned and checked if you want your computer to live a long and prosperous life.

Unless you like looking at dirt everytime you look at your computer, you should go ahead and clean those spills, stains, and dust off of the case. You can do this with just about any cloth and cleaner. Do not use highly abrasive cleaners that might ruin or mar the surface and do not use solvents on plastic. A wet sponge will even work. Just make sure that the cleaner or any liquid does not seep into the inside through cracks and vents. If there is any possibility that you are going to get that messy, turn off and unplug the computer first and wait to turn it back on until any liquid has had a chance to fully dry.

After you have wiped off the outside, it is time for a little inspection. Look at the blades of the fan in the back of the computer. Also look at any vents. Is there dust there? Is there a lot of dust and grime caked on to it? If so, that is an indicator that the inside also needs to be cleaned (I will tell you how to do that in next week's article - How to Clean your Motherboard).

Some clean environments never have to have the inside cleaned. Some need it cleaned monthly. When I lived in Russia, even though I didn't notice it, the air was not clean. The fan on the computer would cake up with dirt and grime after about a month of use. And so I would have to clean the fan, vents, and inside monthly. If I had let it go for several months without cleaning, the fan would have stopped working and the computer would have overheated. Where I now live in the US, the air is clean and I have gone years without having to clean it. Again, the indicator of this is the blades of the fan and the vents. If they are dirty, they need to be cleaned.

You can do some of the cleaning from the outside. First, turn off the computer. Then get out the vacuum sweeper and using the hose, vacuum out the vents and the fan(s). If you have compressed air (you can purchase compressed air from your computer store), you may want to blow air in through the vents (or intake fan if you have one) to loosen the dust and suck it out using the vacuum. If there is still dust or dirt in the vents or on the blades of the fan, you can use a Q-tip to clean them.

If you do not have a vaccum, you can use compressed air alone. Always use short bursts to avoid moisture buildup. Start with the computer off and blow into every hole and vent. Then turn the computer on and blow everything except for the exhaust fan once again.

With the case clean, your computer will look nicer and with the fan and vents cleaned out it will breathe easier and run cooler.

How to watch TV on Mac

2008-10-01T10:36:00.000-07:00

Mac or Macintosh is a brand name for different kinds of computer produced by Apple, Inc. Production of Mac includes all aspects of hardware and own operating system already installed. The Mac is a computer that can run all the major operating systems, including Mac OS X, Windows XP, and Vista.

TV on a PC is in nowadays. How about TV on a Mac?

Widgets are mini-applications that are downloaded and installed to a dashboard for a new function. There are amazing widgets for Mac that will allow us to play TV right on our Mac. There is this viewmy.tv widget that provides access to free Internet television. Besides viewmy.tv, there is also the Ustream.tv for viewing our favorite live stream channels. Before we can download these features, we should first check the system requirements. If we have what are needed to make this application works, we can enjoy watching our favorite shows directly on our Mac.

As we all know, we can’t depend on our Internet connection all the time. Heavy traffic is frequently experienced so we can’t enjoy our favorite show that much. It’s different when we don’t need to download and consume time to have our full view of the channels. But we can have our Macs installed with TV. Aside from widgets, we can enjoy the entertainment of watching TV on our Mac with the help of USB-based tuners like Elgato EyeTV Hybrid that allows us to watch analog and digital TV. Like other common pc, Mac also has its way to have TV on it.

If external devices (USB like EyeTV) do not satisfy us, we can use the PCTV cards like Miglia AlchemyTV Card that is a good choice for computer TV viewing and VHS-to-DVD transferring. It’s a PCI card that requires no additional power supply. We can check miglia.com to check if we have the latest version. After that, set up the PCI card in our Mac, and then install the software using the cd included. To access the newly installed program, we need to restart our Macs and go to the AlchemyTV dialog.

Miglia also offers a TV Micro unit that comes with the unit itself, a cable as connection, an external USB 2.0 extender, a remote control and an Elgato EyeTV 2.

Slingbox is also a good choice. It works not only for common PC but for Macs as well. It has ports for TV input and for Ethernet. Another one is the iTele, which is a Mac application that allows us to watch TV and record a channel we want.

When we are familiar of iTunes, we’ll know Mac. We can go to the iTunes Store to browse different shows and channels. We can have our favorite shows in advance. We can watch an episode before it will be aired or have a copy of the one we missed. We can watch all of this in Mac.These are only some of the ways on how we can have TV on our Macs. More are coming our way, thanks to the advanced technology.

Pointers For Choosing Your Laptop Computer

2008-09-27T06:35:00.000-07:00

Pointers for buying a laptop.

If you're thinking of buying a laptop computer there are undoubtedly some great deals to be found, but what should you be looking for when you're in the market for a updated or even your first laptop computer.

Well, it's always worth sitting down with a pen and paper and thinking about exactly what you need your new laptop computer to do. If you're simply going to use it for word processing and the odd email here and there you don't need the super fast processor and hard drive that can hold thousands of files, so don't let a slick salesman tell you otherwise that’s just going to hurt your pocket.

If it's a family laptop computer you're in the market for you'll want a good all rounder. kidshave a great knack of loading games and other large applications onto a PC without you knowing. which can really effect performance for when you need it for more important things like business or your own games. So make sure you get a good-sized hard drive and a good amount of ram.

Regardless of the type of laptop computer you're in the market for make sure you explain to the salesman exactly what you need it for ( ie is it for the home or on the road). More often than not they'll be able to show you in the right direction, but make sure you only spend an amount you're happy with.

If you're an online shopper then there are some great deals to be found, so just make sure you conduct proper research before jumping in to make that purchase. You'll probably see a lot of adverts for the newest laptop computer on the market , Buying a laptop computer , its just like anything else , make sure you do a good amount of research, be clear about the amount you want to spend and weigh up your options.

The Super Duper Problem Fixer

2008-09-23T03:34:00.000-07:00

One of our customers pointed out a new program to me and wanted me to check it out. This program called itself a bug fixer. It was a sharp looking program and claimed to fix bugs on the user's computer that he didn't even know existed.

It sounded like a super duper problem solver until I downloaded it and took a closer look. Being a programmer I quickly saw behind its smoke and mirrors. It actually only performed six of the over 1000 cleaning processes which our A1Click Ultra PC Cleaner and RegVac Registry Cleaner do.

Even though it did little compared to our programs, it found 504 problems. How can that be? My computer was clean. The program did not show any details about the results but wanted $30 before it would clean them. I'll never know for sure about those results, but I suspect that they were fabricated and that the true number of problems was 0.

There are many shady developers out there that just want to make a quick buck. I doubt this bug fixer program will even be around in a year.

This provides a good lesson to anyone. Be sure to purchase software from a trusted developer and don't buy a program just because it looks nice.

We have been in the software business since 1996 and are continually improving our programs. You will not hear hype and lies from us. Our programs may not look that good on the surface, but under the hood they are super. When you purchase our programs, all future updates are free.

If you haven't tried RegVac Registry Cleaner and A1Click Ultra PC Cleaner, try them today.

The Cheater's Guide To Choosing Fiber Optic Patch Cables

2008-09-19T10:33:00.000-07:00

What is a fiber optic patch cable

Fiber optic patch cable, often called fiber optic patch cord or fiber jumper cable, is a optical cable terminated with connectors on both ends. It has two major application areas: computer work station to outlet and patch panels or optical cross connect distribution center. They are for indoor applications only.

Common types

Fiber patch cables can be divided into different types based on cable mode, cable structure, connector types, connector polishing types and cable sizes.

Cable Mode:

1. Single mode:

Single mode patch cables use 9/125 micron bulk cable and single mode connectors on both ends. Single mode fiber jacket is usually yellow.

2. Multimode:

Multimode patch cables use 62.5/125 micron or 50/125 micron bulk multimode fiber and are terminated with multimode connectors on both ends. Multimode fiber jacket is usually orange.

3. 10gig multimode:

10Gig multimode fibers are specially designed 50/125 micron fibers optimized for 850nm VCSEL laser based 10Gig Ethernet. They are backward compatible with existing network equipment and provide close to three times the bandwidth of traditional 62.5/125 multimode fibers. 10Gig fiber cable jacket is usually aqua.

Cable Structure:

1. Simplex patch cables:

Simplex patch cable has one fiber and one connector on each end.

2. Duplex patch cables:

Duplex patch cable has two fibers and two connectors on each end. Each fiber is marked "A" or "B" or different colored connector boots are used to mark polarity.

3. Ribbon fan-out cable assembly:

For ribbon fan-out cable assembly, one end is ribbon fiber and ribbon connector such as MTP connector (12 fibers), the other end are multiple fibers with connectors such as ST, SC, LC, etc.

Connector Types:

1. Same connector type:

This type has the same type of connector on both ends, such as ST, SC, LC, FC, etc.

2. Hybrid:

This type has different connectors on each end. One end can be SC and the other end can be LC, ST, FC, etc.

Connector Polishing Types

Optical connectors are designed and polished to different shapes to minimize back reflection. This is particularly important in single mode applications. Typical back reflection grades are -30dB, -40dB, -50dB and -60dB.

1. PC (Physical Contact): Typical back reflection is less than -40dB, for single mode and multimode applications.

2. UPC (Ultra Physical Contact): Typical back reflection is less than -50dB, for single mode applications.

3. APC (Angled Physical Contact): Typical back reflection is less than -60dB, for single mode applications.

Special types of patch cables

1. Mode conditioning patch cable

In some cases such as for long wave laser modules used in Gigabit Ethernet, modules need to operate for both single mode and multimode fibers, the mode conditioning fiber optic patch cables will fit for such situations.

By allowing the single mode laser launch to be offset away from the center of the multi mode fiber the mode conditioning fiber optic patch cable reduces the effect of such differential mode delay.These cables are usually duplex type.

2. Polarization maintaining patch cable

Polarization maintaining fiber optic cables are made with a special fiber that maintains the polarization of light waves. They are used where high stability is required, not withstanding fiber and stress movements.

These cables are mainly used in instrumentation, measurement and in some applications where stability is required at speeds above 10Gbps.

PCI DSS and Tape Security

2008-09-15T02:32:00.000-07:00

PCI DSS

The Payment Card Industry Data Security Standard (PCI DSS) was created as a set of requirements for companies that process, store, or transfer credit card data to make it easier on merchants to adopt sufficient security approved by all credit card companies.

The PCI Security Standards Council develops and maintains the standard. Enforcement of the compliance programs and penalties are established by each individual payment brand.

When evaluating solutions for PCI compliance companies should consult auditors and look for products that offer complete PCI coverage to foresee changes in the standards.

PCI also contains ongoing validation requirements. The most comprehensive requirements include three levels of validation:

1. On-site security audit
2. Self-assessment questionnaire
3. Network scan

The level of validation required, and the frequency of validation efforts, depends upon risk and transaction or account volume.

The Real Cost of a Data Security Breach

Data security breach can cost a company an average of $182 per compromised record in legal fees and other expenses. That’s not including the cost of a damaged reputation, competitive advantage and customers lost due to the breach, and the cost for a lawsuit if charges are pressed. Merchants that store cardholder data also have to worry about the potential fine for non-compliance and the threat of increased fees for transactions.

Here are a few examples of recent major breaches in the retail industry.

TJX

45.6 million credit and debit card numbers were stolen.

DSW Shoe Warehouse

Compromised credit card numbers for about 1.4 million customers and driver’s license information of about 96,000 customers.

Card Systems

Compromised information for 40 million credit card holders.

Marriot International

Compromised credit card information and Social Security numbers of 206, 000 customers and employees.

Polo Ralph Lauren

Compromised 180,000 customer’s credit card information.

Sam’s Club/Wal-Mart

Credit card data belonging to an unspecified number of customers were exposed.

PCI Requirements becoming laws

In May 2007 Minnesota became the first state to make PCI requirements into a state law stating that any company that experiences a data security breach will have to reimburse banks the costs that they incurred blocking and issuing new cards.

12 Steps for PCI Compliance

Below is a list of the 12 requirements of the PCI DSS.

1. Install and maintain a firewall configuration to protect cardholder data.
2. Do not use vendor-supplied defaults for system passwords and other security parameters.
3. Protect stored cardholder data.
4. Encrypt transmission of cardholder data across open, public networks
5. Use and regularly update anti-virus software
6. Develop and maintain secure systems and applications
7. Restrict access to cardholder data by business need-to-know
8. Assign a unique ID to each person with computer access
9. Restrict physical access to cardholder data
10. Track and monitor all access to network resources and cardholder data
11. Regularly test security systems and processes
12. Maintain a policy that addresses information security

Merchant and Service Provider Levels and Compliance

Merchant Level Compliance

1. Level 1: Merchants with more than 6 million credit card transactions annually cross all channels, including e-commerce.

Compliance: Annual onsite PCI data security assessment and quarterly network scans.

2. Level 2: Merchant with between 1 and 6 million credit card transactions annually

Compliance: Annual self-assessment and quarterly network scans

3. Level 3: Merchants with between 20,000 and 1,000,000 credit card e-commerce transactions annually.

Compliance: Same as Level 2 Merchants

4. Level 4: Merchants with fewer than 20,000 credit card e-commerce transactions annually Annual self-assessment and annual

Compliance: Annual self assessment and network scans

Service Provider Levels

1. Level 1: All processors and all payment gateways.

Compliance: Annual onsite PCI Data Security assessment and quarterly networks scans

2. Level 2: Any service provider that is not in Level 1 and stores, processes, or transmits more than 1 million credit card accounts/ transactions annually.

Compliance: Same as Level 1 Service Providers

3. Level 3: Any service provider that is not in Level 1 and stores, processes or transmits fewer than 1,000,000 credit card accounts/transactions annually.

Compliance: Annual self-assessment questionnaire and quarterly network scans.

PCI DSS Changes

The PCI Security Standards were updated to address questions about implementation, including:

• Host provider requirements
• New requirement that malicious software, such as spyware and adware, are included in anti-virus capabilities.
• Requirement for application code review or application firewall.
• Requirement for a policy to manage connected entities
• Appendix A – PCI DSS Applicability for hosting providers.
• Appendix B – Compensating controls.

Visit the standard site [https://http://www.pcisecuritystandards.org/pdfs/pci_summary_of_pci_dss_changes_v1-1.pdf] for more information.

Deadlines/Penalties

The deadline for PCI Compliance has passed. Visa estimates that just 36 percent of Level 1 merchants and 15 percent of Level 2 merchants have complied with PCI.

Effective October 1, 2007, acquirers whose transactions qualify for lower interchange rates must ensure that the merchants generating the transactions are PCI compliant in order to receive this benefit.

In 2006, Visa levied $4.6 million in fines for companies not compliant, up from a 2005 total of $3.4 million. Source: VISA [http://usa.visa.com/about_visa/press_resources/news/press_releases/nr367.html]

A closer look at protecting stored data

Just one compromised backup tape can cost a company their reputation, competitive advantage, and thousands in fines. There’s the cost to notify customers, answer the many calls that are received regarding how and why this breach happened, the cost for loss business as a result of the breach, and so on.

BOSaNOVA’s Q3 storage encryption appliance hardware is one option for securing your backup data. For more information on the Q3, contact BOSaNOVA [http://www.theq3.com/] or email info@theq3.com

How to watch TV on Mac

2008-09-13T10:36:00.000-07:00

How to Clean your Mouse

2008-09-10T06:30:00.000-07:00

If your mouse is working sluggishly or not at all, don't go out and buy another cheap mouse. The cause is probably just a dirty mouse. A quick cleaning could fix the problem.

First, you need to identify which kind of mouse you have. If you turn your mouse over and part of a ball is showing, you have a ball mouse. If you see a lens, you have an optical or laser mouse. Each type of mouse requires a different type of cleaning.

The optical or laser mouse does not need to be cleaned near as often as the ball mouse, but it and the surface it runs on can still get dirty. If you do not clean the surface that the mouse moves on, it will soon turn black. So about once a month or so, wipe the surface off with a wet rag. The lens probably never will get dirty, but if it does, take a soft cloth, cotton swab, or q-tip wetted with window cleaner or alcohol and clean the lens.

The ball mouse may need cleaning quite often, so you should get well acquainted with the following cleaning procedure. The dirtier the ball mouse gets, the harder it is to get it to move the cursor on the screen smoothly. If you have to move the mouse across the mouse pad several times to get the cursor to move halfway across the screen, it needs to be cleaned.

The mouse does not need to be disconnected to clean it, but you should close all of the programs that are running, so that you don't accidentally click on something and mess it up. If you do decide to disconnect the mouse, be sure to turn off the computer first. The mouse cord should never be unplugged from the computer while it is running. Doing so could ruin your motherboard.

Turn the ball mouse over and find the cover that holds the ball in. Look for arrows on the cover to show which way it needs to be turned. Place two fingers on the cover and push in the direction of the arrows. Once the cover has been turned about an inch, cover it with your hand and turn the mouse back over to the upright position. The ball and cover should fall into your hand. If it doesn't, shake the mouse gently.

Wipe the ball off with a wet rag.

Now look in the ball well and find the three rollers. Start by cutting across the buildup on the rollers with your fingernail (a knife or steel dental pick may also be used gently), then turn the roller and remove the buildup as you go along. If you do this correctly, you will end up with one curled strip of buildup for each roller. Make sure to remove the buildup from the well. If it falls inside somewhere, blow and gently shake it until it comes out.

Take a wet rag and clean each of the rollers by wiping across it, then turning it and wiping again. Continue until the entire roller is cleaned. Put the ball back in the ball well and lock the cover back in place.

If the mouse still has problems once it is assembled, try cleaning it again. If that doesn't work, you may need to buy a new mouse.

It is a good idea to regularly clean the surface that the mouse is on because the cleaner the surface, the less dirt will get inside the mouse and the less often you will have to clean it.

If your mouse is shared by many people (especially if one of them is sick), you may want to disinfect the top of the mouse between users.

Follow these instructions and your mouse will be up and darting again in no time.

How to Clean the Registry

2008-09-08T07:29:00.000-07:00

In the beginning Windows' registry consisted of two files totalling around 5mb in size. Today it consists of at least 12 files with the Software file itself being 30mb or bigger in size. As the size of the registry has exploded, so has the trash and clutter in it. It may seem like a daunting task, but cleaning the registry properly can fix system problems, speed your computer up, and make it run more efficiently.

I have spent many years developing and refining thousands of procedures to do just that. I could share these methods of hunting down the trash with you and let you find them and delete them by hand, but if you were to sit down at your computer right now and work nonstop, you would still be busy with them a week from now when the next issue of Ray's Computer Tips arrives. By then your registry would have new clutter and you would have to start all over again.

To make registry cleaning easier on everyone, I wrote a program called RegVac Registry Cleaner (http://regvac.com/regvac.htm) to perform those procedures. It has been so successful that several companies have asked me to model their registry cleaners after RegVac and even more have copied processes that first debutted in RegVac.

The first place RegVac cleans is the HKEY_CLASSES_ROOT section (the Classes Vac in RegVac does this). This section contains settings for the classes of Windows. Think of a huge box full of snakes and you will get an idea of how complicated and interwoven it is. It is so complicated that many registry cleaners bypass it or simply perform surface scans of it. RegVac uses over a hundred processes to follow each tentacle of each class deep into this area and make sure that they abide by the rules.

Next RegVac validates the entries in 22 lists with 7 different methods (the FilesList Vac does this). This is a minor part of RegVac but the bulk of most other registry cleaners even though they usually do not clean all 22 lists.

Another part of RegVac, the Software Vac, which is unique to RegVac, finds old software sections in the registry and provides a way to remove that software's entire branch. Other registry cleaners only remove a few entries in this area often leaving huge portions of the registry that do nothing but take up space and get in the way.

Even more trash can be discovered in hundreds of stashes used to store data you will never use. Most registry cleaners do not even touch these. The Stash Vac lists these stashes and lets you go through and select which ones to empty out. Please use caution when using the Stash Vac because some of the items listed there may be important. For example, one folder in the Stash Vac lists places where data for international keyboards are stored. You probably will never use the data for Bulgarian keyboards, so you can remove it, but if you live in the US you may experience problems after removing the United States 101 keyboard. The items that you can safely remove are usually obvious.

Last but not least, when cleaning the registry, you should look for broken links to files on the computer (this is what the Bad Link Vac does). If a file is referenced in the registry but it does not exist on your hard drive, that is a good indicator that something is wrong. Many programmers start out writing a registry cleaner thinking all it has to do is check for these broken links and remove them. In fact, that is all many registry cleaners do.

Even though that is all they do, they often don't do it correctly. If you check the results of such scans, you will find out that many of the broken links are really good links. I spent several months refining this part of RegVac so that as far as I know it is 100% accurate. Despite this, please realize that some software enter broken links in the registry and require them to be there in order for them to run. RegVac skips the ones it knows about, but you still need to be careful with this part of RegVac.

RegVac has six more tools that clean even more areas: the Add/Remove Editor, the System Config Utility, the OpenWith Editor, the AutoComplete Editor, the Junk Keys Editor, and Registry Backup, Pack, and Restore.

Many of you already use RegVac but if you don't, you can downloaded a free 30 day trial of RegVac at http://regvac.com/regvacz.exe. For more information about RegVac Registry Cleaner go to http://regvac.com/regvac.htm. If you like RegVac, you can purchase it for only $29.95. All future updates are free.

Keep the Windows registry clean and running smoothly with RegVac Registry Cleaner.

DVD Repair, Scratched DVDs and Unfinalized DVDs recovery tips and tricks.

2008-09-03T01:28:00.000-07:00

Simple and (hopefully!) free procedures to handle unsuccessfully finalized DVDs, damaged DVDs or DVDs that have not been burned correctly by a video camcorder,recorder or burner and has some corrupt data.

It is a good idea for you to first consider other possible causes of what appear to be DVD errors such as a dirty disc surface, a dirty lens in the DVD reader or other software and hardware related problems. Prior to embarking on any of the following you need to eliminate all possible causes for having trouble with a DVD. Check to see your DVD burner has the latest firmware by going to the manufacturers website. Check to see if the media (brand and type) is compatible with your DVD burner/reader. Once you are certain that you have an unsuccessfully finalized DVD or a corrupt DVD you can get started.

Scratched DVD Disks

A simple visual inspection of the surface of the disc will tell you straight away whether your first problem is physical damage to the disc. If you can see a scratch or scratches on the surface then this may need to be addressed first. I say "may" because personally I use DVDFab to check to see if the disc will copy before I embark on any other course of action. DVDFab can read through a lot of surface errors because of its superior algorithms so I always take the lazy route and see if I can simply make a new copy. Now failing that you could go online and buy some expensive DVD scratch repair kit. Or you could do as I do and go to your local hardware store or even your own garage! All you will need is a bottle of any neutral colored (clear) car polishing product. Turtlewax happens to be the one I use. Take a VERY soft cloth (NOT paper towel), apply a little polish to the surface of the disc and GENTLY (remember, it's not a car!) rub the disc. Use straight strokes from the centre of the disc to the outer edge and continue to do this until you can see the scratch either disappear or reduce noticeably. Then using the same motion and fresh cloth buff the disc back to its original shine. Now try it with DVDFab. If you are still unsuccessful repeat the process until you can be certain, again by visual inspection, that the problem is now not coming from a damaged disc surface.

DVD Data Repair/Recovery

The software you can use for this are DVDFab, Nero 8 (trial) and Isobuster. In the case of Isobuster you can try the free features first but failing that the full featured version needs to be purchased. A straight search of Yahoo or Google will find you the relevant sites.

Put the problem disc in the DVD drive of your computer then:

1. DVDFab. Try to use DVDFab first, as it has the best algorithms for reading anything on a DVD including how it integrates with the DVD drive, honestly sometimes I think it would read a bagel if you put it in there!

Select "DVD to DVD." DVDFab will now try to read the contents of the disc and, if it can, write the contents to a folder on your hard drive. It is as simple as that. It is either going to work or not! If it does do it then the copy you now have on your hard drive will be fully repaired and you can then burn a new copy.

Failing that:

2. Isobuster. Using the free functions try to make a disc image file and burn to another DVD. Isobuster has three alternate methods of dealing with data corruption. It can replace the corrupted area with nothing, with fake data or with a series of zeros. It will give you the choice and just select them in order to try each until one works. Isobuster will not create the disc image file unless it knows it will be successful. If Isobuster has created the file (note where it was going to put it first!) you will have to re-name the extension to .iso. Use the disc image file to burn a new DVD disc. At this point, if you now have a new disc, you need to check that new one carefully. There is always the possibility that Isobuster has just made a perfect copy of your faulty disc! So now you have a brand new faulty disc!

Failing that: You will need to pay for the full version of Isobuster but ONLY buy it if you got this far. If Isobuster free couldn't even read the disc then don't bother.

>From this point forward the best you can hope for is the extraction of the MPEG video files or data files on the disc. You ARE going to lose the video menus and you may lose some of the video or data.

a. Start Isobuster then load the disc.

b. When Isobuster has detected the files on the disc run the "Find Missing Files and Folders" option under the "File" menu.

c. You will now have an entry on the left hand column of "files and folders found by their signature."

d. Select that, then go to "File," "Files found via their signature" then "Extract files found via their signature." Choose a location and let it run.

Now you will have all the files where you selected them to go. The ones with the extension .VOB are the MPEG files from your disc wrapped in the VOB container. They can then be imported into a video editing program using the "Import DVD/VR" function or can be read by most DVD burning software.

Unfinalized discs.

If at all possible try to get the original device used to create the disc to finalize it. If this is not possible or the original device is failing to successfully finalize the disc you may have to resort to the Isobuster routine above.

If you have been left with an otherwise perfectly good disc, but unfinalized, do the following.

This requires Nero 8 (Trial version).

Go to the Nero website, download and install Nero 8. Yes, it's big...sorry!

Place the unfinalized disc into the computer DVD tray. Open Nero 8 StartSmart.
Click "create and edit" at the top of the screen.
Click "author, edit and capture video." NeroVision 5 will start.
Click on the disk tools drop down menu then click "finalize disk."
In the option box that appears choose "no menus" and let it run.

Hopefully you now have a fully finalized disc that is readable.

Hope this helps!

Cisco CCNA, CCENT, And CCNP Home Lab Study: The DTE/DCE Cable

2008-08-30T10:27:00.000-07:00

More Cisco CCNA, CCENT, and CCNP candidates than ever before are putting together their own home labs for their certification exam study, and that's a great trend - there's nothing like learning on the real thing!

Part of putting a home lab together is getting the right cables and understanding their usage. In this new Cisco home lab series, we'll take a look at the different cable types and how each fits into your home lab. The first cable type we'll look at is the multi-purpose DTE/DCE cable.

When I say "multi-purpose", I mean that while the cable will always perform the same task, it can be used in several different points in your home lab network. If you're going to have a frame relay switch - and you should get one if at all possible, since having your own frame relay cloud is a tremendous boost to your home lab studies and your exam score - you're going to need a DTE/DCE cable.

You can also use a DTE/DCE cable to directly connect two Cisco router serial interfaces and configure HDLC (the default) or PPP encapsulation over that point-to-point link.

Most of today's DTE/DCE cables have "DTE" clearly stamped on one end of the cable - actually, "DTE" is probably embedded into the connector itself. Naturally, the other end will have "DCE" clearly indicated. It's the DCE end that will connect to your frame relay switch. If you're going to use a direct connection to run PPP or HDLC, it almost doesn't matter which end of the cable is connected to a given router.

Keyword: "almost". You must use the clockrate command on the DCE end of the connection in order to bring the line protocol up.

If you're not sure which end of your DTE/DCE cable is connected to a given serial interface, just use the show controller serial command to get that information. Most of the output of that command isn't comprehensible, but what we need is right on top:

R3#show controller serial 1
HD unit 1, idb = 0x11B4DC, driver structure at 0x121868
buffer size 1524 HD unit 1, V.35 DCE cable

Naturally, if it's the DTE end, you'll see "DTE" there. And if you don't have anything connected to that interface, you'll see "no cable".

Whether you have your own frame relay switch or not, you'll want to pick up some DTE/DCE cables for direct connections between your Cisco home lab router's serial interfaces. Just don't forget to put the clockrate command on the DCE end of the cable! And if you're not familiar with a frame relay switch, check this same website soon for a tutorial that will show you how to set one up.

Just about any Cisco router can serve as a home lab frame relay switch, and once you've got it configured, you're in good shape - but it can be a little maddening to get it up and running in the first place. I'll show you how to avoid that aggravation in the next installment of this Cisco home lab tutorial series!

5 Questions to Ask when Determining the Location of Your Server Room

2008-08-26T09:25:00.000-07:00

The decision is not clear cut about whether to keep your server room in house or to use a co-location. Some experts suggest that for an increased return on investment, that hosted systems are a better solution. However, if a company is interested in a long term IT growth strategy, it may be better to do a slow build out and internal customization of their own server. Here are 5 questions that need to be asked to help you make up your mind as to what the best solution is for your business:

1. What are your present security requirements?

There are some business types like legal and financial services that must keep their servers in house for security purposes. If your business requires you to constantly monitor your server room, then you don’t have an option and should continue on to the other questions. If your business has flexibility in its server room options, consider the pricing and available options to have an off site co-hosted server room.

2. What are your employees like and what are their needs?

What is the need for integration like in your company? If there are multiple components that need to speak with each other, it is more likely that the best choice is an in house server. If your needs are basic and there is no need for multiple integrations, co-hosting and off site servers could be a viable option for your business to consider.

3. What is your present server room configuration?

The next question to review is how many pieces your current configuration is in and how many different components there are that service other departments. If your business has multiple departments that need to co-exist together on the server, co-hosting loses much of its appeal. If this is the case, in-house management and placement of the server is much more attractive.

4. What are the costs of both strategies?

One of the most important decisions that a business needs to consider is surrounding the cost of the server room. All of the real costs that are associated with placement and management of the server needs to be carefully considered for both in house and out of house server placement and management. Some co-hosting companies add in costs that should be weighed and requested in writing before an arrangement with that company is generated. You don’t want to switch servers and then find out after the fact that there are hidden fees, making the proposition more expensive than your original plan.

5. Do you have to choose one or the other?

With the constantly evolving world of technology, it is possible that you could actually utilize pieces of both strategies if it fits your business needs. When working with an experienced provider, blended solutions can be created to fit an individual company’s needs. Difficult or more complex strategies can be accommodated in-house and more straightforward server needs can be outsourced.

Operating Systems: File Systems

2008-08-21T05:22:00.000-07:00

File systems are an integral part of any operating systems with the capacity for long term storage. There are two distinct parts of a file system, the mechanism for storing files and the directory structure into which they are organised. In mordern operating systems where it is possibe for several user to access the same files simultaneously it has also become necessary for such features as access control and different forms of file protection to be implemented.

A file is a collection of binary data. A file could represent a program, a document or in some cases part of the file system itself. In modern computing it is quite common for their to be several different storage devices attached to the same computer. A common data structure such as a file system allows the computer to access many different storage devices in the same way, for example, when you look at the contents of a hard drive or a cd you view it through the same interface even though they are completely different mediums with data mapped on them in completely different ways. Files can have very different data structures within them but can all be accessed by the same methods built into the file system. The arrangment of data within the file is then decided by the program creating it. The file systems also stores a number of attributes for the files within it.

All files have a name by which they can be accessed by the user. In most modern file systems the name consists of of three parts, its unique name, a period and an extension. For example the file 'bob.jpg' is uniquely identified by the first word 'bob', the extension jpg indicates that it is a jpeg image file. The file extension allows the operating system to decide what to do with the file if someone tries to open it. The operating system maintains a list of file extension associations. Should a user try to access 'bob.jpg' then it would most likely be opened in whatever the systems default image viewer is.

The system also stores the location of a file. In some file systems files can only be stored as one contigious block. This has simplifies storage and access to the file as the system then only needs to know where the file begins on the disk and how large it is. It does however lead to complications if the file is to be extended or removed as there may not be enough space available to fit the larger version of the file. Most modern file systems overcome this problem by using linked file allocation. This allows the file to be stored in any number of segments. The file system then has to store where every block of the file is and how large they are. This greatly simplifies file space allocation but is slower than contigious allocation as it is possible for the file to be spread out all over the disk. Modern oparating systems overome this flaw by providing a disk defragmenter. This is a utility that rearranges all the files on the disk so that thay are all in contigious blocks.

Information about the files protection is also integrated into the file system. Protection can range from the simple systems implemented in the FAT system of early windows where files could be marked as read-only or hidden to the more secure systems implemented in NTFS where the file system administrator can set up separate read and write access rights for different users or user groups. Although file protection adds a great deal of complexity and potential difficulties it is essential in an enviroment where many different computers or user can have access to the same drives via a network or time shared system such as raptor.

Some file systems also store data about which user created a file and at what time they created it. Although this is not essential to the running of the file system it is useful to the users of the system.

In order for a file system to function properly they need a number of defined operations for creating, opening and editing a file. Almost all file systems provide the same basic set of methods for manipulating files.

A file system must be able to create a file. To do this there must be enough space left on the drive to fit the file. There must also be no other file in the directory it is to be placed with the same name. Once the file is created the system will make a record of all the attributes noted above.

Once a file has been created we may need to edit it. This may be simply appending some data to the end of it or removing or replacing data already stored within it. When doing this the system keeps a write pointer marking where the next write oparation to the file should take place.

In order for a file to be useful it must of course be readable. To do this all you need to know the name and path of the file. From this the file system can ascertain where on the drive the file is stored. While reading a file the system keeps a read pointer. This stores which part of the drive is to be read next.

In some cases it is not possible to simply read all of the file into memory. File systems also allow you to reposition the read pointer within a file. To perform this operation the system needs to know how far into the file you want the read pointer to jump. An example of where this would be useful is a database system. When a query is made on the database it is obviously ineficient to read the whole file up to the point where the reuired data is, instead the application managing the database would determine where in the file the required bit of data is and jump to it. This operation is often known as a file seek.

File systems also allow you to delete files. To do this it needs to know the name and path of the file. To delete a file the systems simply removes its entry from the directory structure and adds all the space it previously occupied to the free space list (or whatever other free space management system it uses).

These are the most basic operations required by a file system to function properly. They are present in all modern computer file systems but the way they function may vary. For example, to perform the delete file operation in a modern file system like NTFS that has file protection built into it would be more complicated than the same operation in an older file system like FAT. Both systems would first check to see whether the file was in use before continuing, NTFS would then have to check whether the user currently deleting the file has permission to do so. Some file systems also allow multiple people to open the same file simultaneously and have to decide whether users have permission to write a file back to the disk if other users currently have it open. If two users have read and write permission to file should one be allowed to overwrite it while the other still has it open? Or if one user has read-write permission and another only has read permission on a file should the user with write permission be allowed to overwrite it if theres no chance of the other user also trying to do so?

Different file systems also support different access methods. The simplest method of accessing information in a file is sequential access. This is where the information in a file is accessed from the beginning one record at a time. To change the position in a file it can be rewound or forwarded a number of records or reset to the beginning of the file. This access method is based on file storage systems for tape drive but works as well on sequential access devices (like mordern DAT tape drives) as it does on random-access ones (like hard drives). Although this method is very simple in its operation and ideally suited for certain tasks such as playing media it is very inneficient for more complex tasks such as database management. A more modern approach that better facilitates reading tasks that arent likely to be sequential is direct access. direct access allows records to be read or written over in any order the application requires. This method of allowing any part of the file to be read in any order is better suited to modern hard drives as they too allow any part of the drive to be read in any order with little reduction in transfer rate. Direct access is better suited to to most applications than sequential access as it is designed around the most common storage medium in use today as opposed to one that isnt used very much anymore except for large offline back-ups. Given the way direct access works it is also possible to build other access methods on top of direct access such as sequential access or creating an index of all the records of the file speeding to speed up finding data in a file.

On top of storing and managing files on a drive the file system also maintains a system of directories in which the files are referenced. Modern hard drives store hundreds of gigabytes. The file system helps organise this data by dividing it up into directories. A directory can contain files or more directories. Like files there are several basic operation that a file system needs to a be able to perform on its directory structure to function properly.

It needs to be able to create a file. This is also covered by the overview of peration on a file but as well as creating the file it needs to be added to the directory structure.

When a file is deleted the space taken up by the file needs to be marked as free space. The file itself also needs to be removed from the directory structure.

Files may need to be renamed. This requires an alteration to the directory structure but the file itself remains un-changed.

List a directory. In order to use the disk properly the user will require to know whats in all the diretories stored on it. On top of this the user needs to be able to browse through the directories on the hard drive.

Since the first directory structures were designed they have gone through several large evolutions. Before directory structures were applied to file systems all files were stored on the same level. This is basically a system with one directory in which all the files are kept. The next advancement on this which would be considered the first directory structure is the two level directory. In this There is a singe list of directories which are all on the same level. The files are then stored in these directories. This allows different users and applications to store there files separately. After this came the first directory structures as we know them today, directory trees. Tree structure directories improves on two level directories by allowing directories as well as files to be stored in directories. All modern file systems use tree structore directories, but many have additional features such as security built on top of them.

Protection can be implemented in many ways. Some file systems allow you to have password protected directories. In this system. The file system wont allow you to access a directory before it is given a username and password for it. Others extend this system by given different users or groups access permissions. The operating system requires the user to log in before using the computer and then restrict their access to areas they dont have permission for. The system used by the computer science department for storage space and coursework submission on raptor is a good example of this. In a file system like NTFS all type of storage space, network access and use of device such as printers can be controlled in this way. Other types of access control can also be implemented outside of the file system. For example applications such as win zip allow you to password protect files.

There are many different file systems currently available to us on many different platforms and depending on the type of application and size of drive different situations suit different file system. If you were to design a file system for a tape backup system then a sequential access method would be better suited than a direct access method given the constraints of the hardware. Also if you had a small hard drive on a home computer then there would be no real advantage of using a more complex file system with features such as protection as it isn't likely to be needed. If i were to design a file system for a 10 gigabyte drive i would use linked allocation over contigious to make the most efficient use the drive space and limit the time needed to maintain the drive. I would also design a direct access method over a sequential access one to make the most use of the strengths of the hardware. The directory structure would be tree based to allow better organisation of information on the drive and would allow for acyclic directories to make it easier for several users to work on the same project. It would also have a file protection system that allowed for different access rights for different groups of users and password protection on directories and individual files.Several file systems that already implement the features ive decribed above as ideal for a 10gig hard drive are currently available, these include NTFS for the Windows NT and XP operating systems and ext2 which is used in linux.

How to clean your Mother Board

2008-08-17T07:21:00.000-07:00

If you have not done the inspection mentioned in the previous article - How to Clean your Case, now is the time to do so. Look at the blades of the fan in the back of the computer. Also look at any vents. Is there clusters of dust there? Is there grime caked on to it? If so, the inside needs to be cleaned. If the fan blades are clean but it has been several years since you have cleaned the motherboard or if the computer is around cigarette smoke, it probably should be cleaned anyway. Dust and particles in the air (like cigarette smoke) can build up on the circuitry of the motherboard and cause it to heat up and/or corrode.

The first thing that you need to do is unplug your computer. Then open up the case to get access to the motherboard. Cases open differently. If you don't know how to open your case, look on the back of your computer along the edge for some screws. These screws may hold on side panels or an upside down U shaped panel that covers the sides and top. Removing the screws will allow you to take off the cover. Other cases have the screws on the front of the computer. To get access to these screws, you must first remove the front panel by pressing a hidden latch. The cover is there to give easy access to the inside of your computer, so if you look hard enough, you should be able to figure out how to remove it.

Remember that if you touch anything on the motherboard, you should be grounded by either touching the metal frame of the computer with your other hand or by wearing a special grounding device.

The goal of cleaning the motherboard is to remove all dust and debris from the motherboard and all components inside of the case. This can be done using one of three methods.

The preferred method is to use a can of compressed air to blow it out. Always hold the can in an up-right position to prevent the propellent chemicals which can damage or corrode components from coming out. Dust and dirt should be blown away from the motherboard and out of the case.

Another way to remove dust is to use a vacuum. The common advice is to only use a battery operated vacuum because an AC powered vacuum causes static and static can ruin the motherboard. I have used an AC powered vacuum (before I knew that it was not recommended) to clean my motherboard many times and it has never caused any problems, but I may have just been lucky. When using the vacuum, keep the nozzle a couple of inches away from the motherboard or any other components so that it does not come in contact with them and so that any small parts are not sucked into the vacuum.

If you do not have a can of compressed air or a vacuum, you can use a dry cloth and brush to clean the motherboard. Be careful not to dislodge or break anything using this method.

While cleaning the motherboard, be careful not to unplug any cables or connections or to dislodge any loose components, such as, jumpers.

Methodically clean the whole inside of the case going over all of the motherboard from one end to the other and all other components. Don't forget to clean the fans and heat sinks. Do not open up the power supply box or stick anything in it beyond the fan. If you do, you could get a shocking surprise and ruin your computer.

If your computer does not work when you put it back together, something was obviously dislodged during the cleaning. Open the case back up and push all connections and cards into their slots. Look for anything that may have become disconnected.

Cleaning the motherboard is probably the most dangerous form of cleaning but it is necessary to prevent an early death of your computer.

How to Clean Disc Drives

2008-08-14T11:16:00.000-07:00

When your CD or DVD (disc) drive starts giving you problems, your first thought may be to replace it or take it to the repair shop, but a good cleaning may be all it needs.

Below are three methods to clean the disc drive. The easiest method is the least effective. The hardest method is the most effective. Since the hardest method takes some time to do, I recommend that you start with the easiest method. If it solves your problems, congratulations. If not, try the next method.

The Cleaner Disc method - this, the easiest method, uses a special cleaner disc which can be purchased in computer stores. The disc usually comes with a little bottle of cleaner solution. Apply a few drops of the solution to the disc and insert it in the disc drawer (be sure to read and follow the instructions that come with the cleaner disc). The drive will turn the disc and clean the lens. Unfortunately, this only works adequately about half the time.

The Cleaning Stick method - this is what I do in desperation when the cleaner disc does not work and I don't want to disassemble the drive. Since all that is needed (at least in my mind this is true) is a little more pressure applied to the lens, I start out in search of a thin, flexible stick of some type which is at least six inches long. It should not have sharp or rough edges that would scratch the lens. Next, get a soft, thin cloth and put water or rubbing alcohol in the middle of it. Place one end of the stick under the wet part of the cloth and slide it into the opened disc drawer. The goal is to rub the wet cloth on the lens to clean it. Do not apply so much pressure that you will scratch and ruin the lens. Also try blowing into the disc drive to remove any dirt that may have accommulated in it. If you do not succeed at this, proceed to the next method.

The Disassembly method - this method should work but it requires you to disassemble the drive. So if you are not comfortable with taking the drive apart, please take it to a computer repair shop and let them do it.

Take the cover off your computer, unplug the cords from the back of the disc drive, remove any screws holding it in, and slide it out (you may need to remove the face plate on the end of the drawer to get the drive out). Remove the screws in the drive housing and take the cover off. The bottom side of the drive is a circuit board, so if that is what you see when you take the cover off, figure out how to access the other side. On the correct side, you should see a lens that runs on a track (there is no harm in moving the lens along the track but do not touch the lens itself). Use a wet, soft cloth to clean the lens.

Sometimes a disc drive malfunctions because there is too much dust or debris in it, so be sure to clean out the inside with either compressed air, a soft cloth, or a cotton swab. Reassemble the disc drive, put it back in the computer case, and cross your fingers. Hopefully, it will work when you turn on the computer.

If these methods work, you just saved yourself some money. If not, you needed a better disc drive anyway.

Creating A Software Library

2008-08-10T01:14:00.000-07:00

Every business uses computer software. But not every business realises the importance of having a user friendly software library for cataloging all their software.

While sharing software and using it on more than one computer is against the law, making a copy to keep in your software library in case it is ever needed is not only allowed, it is strongly advised.

In this sense a company’s software library is the computer equivalent of the box that says ‘break glass in emergency’; it grants you access to the vital software your company uses to run its day to day business. If anything goes wrong or the original software is corrupted in any way, you have the back up you need to get you out of trouble.

It’s obvious then that the library needs to be properly catalogued and kept fully up to date, to ensure that everything is where it should be in the event that it’s ever needed. Consider it as a fire extinguisher to help put out the flames caused by malfunctioning computer equipment. If you don’t know where that extinguisher is – or even worse, you haven’t got one at all – the flames could spread out and affect your whole business. Use the fire extinguisher however and everything is back to normal in no time.

The process of creating a software library can ironically be made much easier by purchasing software that is designed to make the task easy to perform and control. The companies that specialise in this kind of software also offer support services to help you get your own library up and running.

The most important aspect is to consider your needs and the best way of organising your own business software library. It needs to be easy to access and update, while remaining secure at all times.

For this reason it’s advisable to make sure that only a few key members of staff can access the software library. It’s not necessary for everyone to have access to it, and the more people are able to do so, the more likely it is that it will be compromised.

Once the library has been created it will be necessary to update it every time a new piece of software is integrated into the current computer system. Making a particular person responsible for seeing that this is done will ensure the integrity of the software library remains secure.

Cisco And CompTIA Practice Questions: Etherchannels, The OSI Model, And More!

2008-08-08T04:13:00.000-07:00

Here are some questions on static routing, the OSI model, IP version 6, and other topics to help prepare you for CCNA, CCENT, and CCNP certification exam success! Network+ candidates, I didn’t leave you out!

CCNA Certification:

What character or combination of characters indicates a statically configured default route?

Answer: An "S*" next to a route indicates that it is a default static route. If there were no asterisk, the route type indicated would be a static route – but not a default static route.

CCENT Certification / Network+ Certification Question:

Which one of the following networking terms is not associated with the same OSI layer as the others?

A. router

B. packet

C. TCP

D. IP

Answer: C. TCP runs at the Transport layer of the OSI model. The other three terms are associated with the Network layer. The Network layer is sometimes referred to as the “routing layer”.

CCNP Certification / BSCI Exam:

If an IPv6 address begins with "FF", what kind of address is it?

A. broadcast

B. unicast

C. anycast

D. multicast

Answer: D. Any IPv6 address beginning with "FF" is a multicast. IPv6 does not use broadcasts.

CCNP Certification / BCMSN Exam:

You've configured an Etherchannel and note that the trunk has gone down. You check the interfaces on one switch and note that two are "err-disabled". The corresponding ports on the other switch are not. What should you do?

A. Nothing - that's the normal and desired behavior.

B. Shut and reopen the err-disabled interfaces.

C. Shut and reopen the non-err-disabled interfaces.

D. Use the err-abled command on the err-disabled interfaces.

Answer: B. After finishing the config, shut and reopen the err-disabled interfaces. If the configuration is correct, that will do the trick. This is common when you configure all of the ports on one switch and then start configuring the other switch, rather than going back and forth between the appropriate ports on the switches.

See you soon with more CCNA, Network+, CCNP, and CCENT questions!

5 Powerful And Free Methods That I Use To Speed Up My PC

2008-08-05T03:59:00.000-07:00

Many of my friends say that I am obsessed with techniques on how I can speed up my PC.

Whether I’m doing some work with Adobe Photoshop, Adobe Illustrator, and Adobe InDesign all running at the same time, or whether I’m playing Gears of War while World of Warcraft in windowed mode is minimized, I always want my PC to perform as fast as possible. Yes, I am a speed junkie. I easily get frustrated with the slightest hint of a load time.

Hence, I am always on the lookout for ways to speed up my PC.

Here are 5 such methods that I use to speed up my PC and to ensure that it will always run at optimum performance with very minimal hiccups.

Speed Up My PC, Technique No. 1: Download The Latest Drivers

The physical components of your PC stay the same, unless you remove and replace them. But the software they run? They constantly change. The programs sold today will fall pale in comparison with the programs that will be made available next week. The websites we visit will evolve based on the internet technology that will be introduced.

And how are our systems supposed to cope up?

When I want to speed up my PC, the first thing I do is to download the latest drivers for the physical components of my rig. Graphic card, motherboard, modem… you name it, I download it! I make sure that nothing but the latest driver is installed in my system.

Speed Up My PC, Technique No. 2: Keep Your Registry Squeaky Clean

Does it take forever to boot up your system? Chances are, your registry is bogged down by useless leftover files from the programs you have installed, even if you have already uninstalled them.

Whenever I want to speed up my PC, I open my favorite registry cleaner to scan my system for some redundant, and sometimes harmful, leftover files. Then I let it do its thing, deleting the non-essential files whenever it could.

Reg cleaners really help speed up my PC, and there is no reason why they can’t help you speed up yours.

Speed Up My PC, Technique No. 3: Your System May Have Been Infected By Spyware And/Or Adware

Sometimes, slow boot up time and slow processing speed are caused by the infestation of spyware and/or adware in your system. Spyware and adware are forms of malware that surreptitiously find their way into your PC, often through the websites you visit or the email attachments you open.

If I am infected by spyware and/or adware and I want to speed up my PC, I simply open my most trusted spyware remover – Search & Destroy – a free utility that is powerful enough to wipe out all the known spyware and adware variations today.

Speed Up My PC, Technique No. 4: Scan For Viruses And Kill Them

Slow PCs may also be caused by viruses, the most popular of which are Trojans – wicked programs that keep hammering our systems their evil deeds.

There is only one way to determine the existence of a virus in your system, that is, by running a complete diagnostic scan using an anti-virus software. The best anti-virus software I can recommend is AVG, a free, open source program that is regularly updated with the latest virus descriptions which allows the program to run a really comprehensive examination of your system.

Thereafter, the anti-virus program will eliminate the threat and I’d be able to speed up my PC with no hassle at all.

Speed Up My PC, Technique No. 5: Defragment Regularly

One of the really under-appreciated features of a Windows-based PC is the Disk Defragmenter. Basically, the Disk Defragmenter will eliminate useless and redundant files in your entire system, not just your registry.

I swear to God, defragmenting your disk is THE best way to speed up my PC. Defragmenting may take a couple of hours or more, but the end result is very much worth it.

To access the Disk Defragmenter, go to START, then ALL PROGRAMS, then ACCESSORIES, then SYSTEM TOOLS, and voila! You’d be able to speed up your PC as efficiently as I can speed up my PC!