Top Ten Concepts For Linux Beginners - Number 9, Certification

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by Levi Reiss

There are currently four programs that enable people to become certified as Linux Systems Administrators. These programs are offered by the Computing Technology Industry Association, the Linux Professional Institute, the Novell Corporation, and Red Hat, Inc. The first two are professional industry associations whose certification programs do not depend on any specific Linux distribution. Novell and Red Hat Linux certifications are closely associated with their popular Linux distributions. Should you wish to prepare for either of these two certifications you will definitely need access to their Linux version.

What's involved in obtaining a Linux Certification? You must pass one or more extensive tests that demonstrate your prowess in dealing with the typical and some atypical problems faced by Linux systems administrators. We'll take a closer look at the CompTIA Linux+™ Certification, the one often recommended as the first certification for people new to Linux. This certification does not apply to any specific Linux version. The test is designed to validate the knowledge of individuals with a minimum of six to twelve months of practical Linux experience. According to the Computing Technology Industry Association, professionals achieving the CompTIA Linux+ certification can explain fundamental management of Linux systems from the command line, demonstrate knowledge of user administration, understand file permissions, software configurations, and management of Linux-based clients, server systems, and security. Many of these functions are available on Damn Small Linux.

The Linux+ certification is a basic, entry-level certification for Linux system administrators. It is intended for people with six-months experience installing, operating and maintaining Linux operating systems. To achieve Linux+ certification, candidates must pass the 98 question Linux+ exam which covers seven areas: Planning and Implementation; Installation; Configuration; Administration; System Maintenance; Troubleshooting; and Identify, Install and Maintain System Hardware. This multiple-choice exam costs about $232 and is a good starting point for those who want to continue with other Linux certifications including those from Novell and Red Hat.

Why would anybody want to start preparing Linux certification on a limited version of Linux? The answer is simple – certification is not to be taken lightly. Don't make a major financial and time investment unless you know that you really want to be certified and that you possess the required skill set. It's not hard to find schools that promise you success in Linux certification and in any of their course offerings. But Linux certification may not be for you. Don't make a major certification investment only to find that it wasn't what you had in mind. Work your way through my tutorials including the suggestions for going further. Get your hands on a variety of Linux books. I would start with books designed for learning Linux and for running Linux systems before working with Linux certification books.

Don't be satisfied with running computer exercises in your mind, and nodding your head at the appropriate times. To succeed you must do the exercises on a computer running Linux. Since installation is a component of all Linux Certification exams don't stint on installing several versions of Linux on your computer. An external USB hard drive is not very expensive. Try to make friends with someone who knows better than you how to do things. Ask a lot of questions. And good luck!

And while you're working on your certifications take a look at some of Damn Small Linux's other advantages in our final article in this series.

Levi Reiss authored or co-authored ten computer and Internet books. He teaches Linux and other computer subjects at an Ontario French-language college. Visit his new site www.linux4windows.com, to learn how to download and run free Damn Small Linux on your Windows computer. His other sites include www.theworldwidewine.com and www.travelitalytravel.com.

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The Current Status of FTTH in the US and the Rest of the World

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by Colin Yao

Understanding FTTH (Fiber To The Home)

FTTH is an all-fiber connection to the home which provides a minimum of 155Mbps bandwidth on both up stream and down stream directions. Basically, it is composed of a fiber from the service node to the optical splitter, the optical splitter which separates to (fan out) terminate on single home ONU.

So similar to FTTC (Fiber To The Curb), FTTH is a point-to-point architecture with a dedicated connection from the home to the network. This fiber link provides secure transmissions by virtue of the fact the it is much harder to tap a fiber than a copper cable.

FTTH is much better suited for broadband service applications than DSL and other intermediate technologies. It is our broadband future.

Cost Savings of FTTH

FTTH provides a robust outside plant which requires extremely low maintenance over the lifetime of the system. Fiber based networks require considerably less maintenance than traditional copper networks.

FTTH in the US

Currently in the US, FTTH is not yet a real alternative challenge to interactive digital services distributed over cable, DSL, satellite and other media. Why? The simple reason is the cost. The cost for roll out a widespread FTTH infrastructure is exorbitant and therefore currently it is only feasible in urban and business areas.

FTTH offers up to 20 times more bandwidth than ADSL which is tremendous to most Americans. And once the fibers are in the ground, the capacity can be upgrade to even more by simply upgrading or adding new equipment on the end. In the future, FTTH will not only be offered to larger business customers but also for residential customers, SoHos and SMEs.

However, most of the largest telcos are still limiting their FTTH deployment to small-scale trials. But many smaller carriers and newcomers are pushing ahead with actual product offerings and are creating a significant base of fiber users. Bellsouth is playing a very active role. Another active player is Verizon with its FiOS offering.

Fiber-to-the-home connections in the U.S. have more than doubled from a year ago to surpass the 2 million mark, according to data released today from Render Vanderslice and Associates.

Verizon Communications accounts for about two thirds of the country's FTTH subscribers and more than two thirds of the homes passed by fiber.

Other players including AboveNet and Paxio. AboveNet, PAXIO team on FTTH network in San Francisco Bay area.

FTTH in Europe

In Europe, FTTH is just at the beginning of its life cycle. In Germany, BerliKomm (based in Berlin) is preparing to offer FTTH. And in Sweden, Bredbandsbolaget (the leading FTTH player) is already offering FTTH services. In Austria, Wienstrom is also offering FTTH service under the name of "i-blizz".

FTTH in Asia

Hong Kong, South Korea and Japan are the world leaders in the percentage of homes that receive broadband communications services over direct fiber optic connections, according to a new global ranking of fiber-to-the-home (FTTH) market penetration.

According to this first ever official ranking of FTTH deployments in the world's economies, 21.2 percent of homes in Hong Kong are wired with FTTH, followed by South Korea at 19.6 percent and Japan at 16.3 percent. Scandinavian countries occupy the next three positions, with Sweden having 7.2 percent of its households connected to FTTH, Denmark at 2.9 percent and Norway at 2.5 percent.
Taiwan, Italy, People's Republic of China, The Netherlands and the United States round out the top 11 economies, with FTTH penetration rates of between 1.4 and 1 percent of households. Only economies with penetration of 1 percent or more were included in the ranking.
The three regional FTTH Councils joined together to create this first official global FTTH ranking in order to provide the telecommunications industry, governments and regulators with a unique snapshot of international fiber access penetration. Going forward, the councils will update and re-issue the rankings on an annual basis, as well as work jointly to further refine the research methods in order to provide more in-depth information.

Colin Yao is an expert on fiber optic communication technologies and products. Learn more about cable pull machine, cable pulling techniques, cable pulling machine on Fiber Optics For Sale Co. web site.

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Enter To Win

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by Sheezaym

Have you ever wondered if people really do win at sweepstakes and contests? Have you tried to enter as much as you can, but still have come up empty handed? Well, don't give up just yet!

Winning at sweepstakes is very common among sweep enthusiasts, if you have the right mindset and strategy. Yes, you do need a plan! The first thing is getting used to the terminology used, and some basic rules. There is a big difference between a sweepstakes and a contest. A sweepstakes is when a company holds a prize drawing with absolutely no strings attached. They do not require commitments or purchases. They are merely introducing a new product, company or maybe a new media, (such as movies & music). You may run into a website that offers various non related prizes every week, or month. It may not be their own products, but they would like you to see what they have to offer. Their sole purpose is for you to get to know them better.

A contest is a little different. They too, are offering a prize so that you will come and visit them, and see what they are all about. They may want to spice some things up and get you a little more involved with their company before you enter to win. They want to attract people to their contest that has a genuine interest in their product. They may ask you to send them a recipe or a photo. They may have a trivia game for you to play. Some contests have you find different things on their website. All are meant for fun, and for them to introduce themselves to you.

Sometimes though, you may run into a contest that has you pay to enter. I strongly urge you not to pay to enter a contest. To me, it is a large red flag when I see contests that you need to pay to win! Please, don't waste your money! Raffles for charity causes are my only exception. I believe that if we have a charity that we consider to be important, than by all means please support them! If you win a prize of some sort, than it can be a little sunshine to your day!

Enter to win a trip to see American Idol 7 live visit: http://www.americanidolcontest.

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Data Loss Effects on Different Types of Companies

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by Andrew Watson

No one can contradict the fact that how the data loss can severely impact the companies. But this is not necessary that this impact is same for all of them. Let us say any R&D company has suffered hard drive crash then due to having some confidential data related to the new inventions, this is hard for it to trust on any of the data recovery service provider company.

So this becomes a hard and fast rule for that company that to choose the one which is reliable and has been known for the same from decades. This will let the R&D companies to be sure that the data will remain confidential and the success of the data recovery operations is guaranteed.

Some R&D projects take several years to get completed. So loosing any of the information about the projects is not at the money level but this also the time loss that the developers have spent.

The banks and financial institutions are running their business based on the millions of transactions each day. Now let us suppose that a person wants to invest $ 2000 in the stock market but due to the present data loss problems in the stock brokerage company, he/she can't do so. If the company deals with approximately 100 transactions each day then the total loss would be $ 20000 per day until the data recovery is not done. Thus the longer it takes for data recovery, the larger it will loose.

A customer only puts his/her money in your financial institution if he or she trusts your company and if that gets lost then this costs at price of the market reputation of the institution. Such types of data loss incidents will make the customer to doubt your trustworthiness and he or she is bound to take his or her business elsewhere.

For the film and advertisement companies, lot of time, money and efforts are required. There is a use of lot of external technical expertise and resources that cannot be replicated easily. If some film or advertisement copy is lost then that would mean losing all the financial resources that went into making that copy. As lot of money has been spent in producing the movie but a silly data loss incident can convert this expenditure into large financial losses and no benefits.

So as proved from the above examples, the data loss can affect in several of the ways to the company based on the works that the company performs and the type of information it possess. So the relevance of data recovery runs the uniform kinds of issues for them. However the way outs for uncovering the data loss is unique for all i.e. data recovery software for logical data loss and data recovery services for the physical data loss.

Seeking the confidential matters and safety aspects of the data, the reliability of the data recovery software and guarantee of the data recovery company that they will go for keeping the data confidential is the primary facet to be seen. So better choose according to your needs.

Stellar Information System Ltd. is a data recovery company which fulfills all your data recovery needs. The data recovery software are available for operating systems like Windows, Macintosh, Linux, UNIX and Novell. They perform a systematic scan of your hard drive and fetch your data from it. These data recovery software do not alter the data even a bit and retrieve them intact.

Data recovery service by Stellar is provided in the Class 100 Clean Room where apt surroundings are given to the failed hard drive. Stellar assures you that your data will remain just under your limits and will not leak at all after data recovery by its experts.

The data recovery experts are well qualified and experienced and carry out the best procedures for the data recovery.

Andrew Watson a student of Mass Communication doing research on data recovery software. He is also a freelancer for http://www.stellarinfo.com

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Cisco CCNA, CCNP, and Network+ Exam Practice Questions: ARP, Layer 3 Switches, WPA, and More!

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by Chris Bryant, CCIE #12933

Test your knowledge of vital Cisco and CompTIA certification exam topics with these free questions!

Network+ / CCENT / CCNA Question:

What protocol allows a host to determine the MAC address of another host that is on a different side of the router?

Answer: Proxy ARP.



CCENT Certification:

Briefly describe how a Cisco switch builds its MAC address table.

Answer: The switch examines the source MAC address of incoming frames, then checks its MAC address table to see if an entry exists for that address. If not, an entry is made that maps that MAC address to the port that received the frame.


CCNA Certification:

Convert the binary string 10101010 into a hex value.

Answer: In decimal, that string equals 170; that's AA (or aa, case does not matter).


CCNP Certification / BSCI Exam:

In the BGP best-path selection process, what is the first attribute a Cisco router examines?

Answer: The Cisco-proprietary attribute weight is the first attribute considered.



CCNP Certification / BCMSN Exam:

On a Cisco L3 switch, what command converts a routing port to a switching port?

Answer: The command is switchport. To change a port from switching to routing, run no switchport.


CCNP Certification / ISCW Exam:

Basically, what is a "demilitarized zone"?

Answer: A DMZ is the area between a company's private network ("inside network") and the outside world. Packets going from the inside network to the DMZ and from the DMZ to external networks are generally examined by security devices.


CCNP Certification / ONT Exam:

Name three major differences between WEP and WPA.

Answer: Wired Equivalent Privacy (WEP) offers static keys, an easily hacked authentication setup, and is not considered a scalable solution. Sounds promising, right? That's why WPA is a much more attractive solution. WPA uses dynamic keys, isn't easily hacked, and is highly scalable.


Look for more Network+, CCNA, CCENT, and CCNP questions on this website!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP exam tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. Visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! A free 7-part course, "How To Pass The CCNA", is also available. Get your Cisco CCNP Boot Camp with this special from The Bryant Advantage!

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Multicast Wireless?

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by Roberto Bell

Multicasting is the process of broadcasting a huge number of routing packets to multiple destinations with the use of fewer networks. Multicasting when used over wireless networks like cellular telephones is known as multicast wireless. As mobile companies all over the world upgrade their wireless networks to enhance the efficiency of new functions like mobile TV or IPTV, the bandwidth usage goes up dramatically, leading to the need for multicast wireless technology. Although the concept of wired multicasting, like ATM multicasting and IP multicasting, is still popular in some areas, it won't be very long before wireless multicasting takes over the world.

Universal Mobile Telecommunication System (UMTS) is the preferred architecture that will promote third-generation mobile telecommunication systems. UMTS is an offspring of the second-generation mobile telecommunication system (GSM). UMTS is geared to provide higher bandwidth radio access, especially for packet-data-based traffic, in addition to conventional voice services. UMTS can provide maximum bandwidths ranging from 64kb/s - 2Mb/s. Enabling UMTS for different and concurrent high-bandwidth users, thereby reducing cost, will require multicast wireless protocols to be in place.

Multicast wireless technology replaces the older technology with only a few infrastructural changes. To begin with, existing routers must be upgraded to include a specific multicast routing application in place of the older, traditional algorithms. When we speak of wireless multicasting, the most important medium of communication or broadcasting is the omni-directional antennas.

Multicasting is generally conducted through what is known as source-based multicast trees. The multicast tree operates on a number of algorithmic structures. The source-based mediums may need the receiver's addresses and topology data. DVRMP and MOSPF are some of the best examples of the algorithms that are traditionally used in the process, especially for video broadcasting. All wireless broadcasting or multicasting processes are guided by a bunch of multicasting network protocols.

Wireless multicasting technology has triggered a tremendous curiosity in the minds of technocrats across the world. As mentioned earlier, the main reason for this is the rise in the number of mobile service provides, as well as the new functions and applications that are being integrated into mobile networks and wireless Internet connections. Moreover, communication dysfunction is harmful for basic and necessary services like the military, so the introduction of multicast wireless has made staying connected both easier and more effective. Cheaper broadcasting means many television channels can reach out to millions across the globe via IPTV and mobile TV broadcasting. In retrospect, it is clear that the need for multicast wireless was always present, but the realization has set in a bit late.

The purpose of having a wireless multicasting procedure is to maximize the security levels that were often found lacking in wired multicasting. Don't be surprised if you see a constant growth in the quality of various broadcasting services now that they have wireless multicasting to fall back on.

Paul Benson writes on topics such as Multicast Wireless, Bluetooth and MMS for The Tech FAQ.

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Win your way to significant land-based poker tournaments in online qualifiers practically with no risk

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by Roberto Bell

Broadcasted lanbased poker tourneys enjoy nowadays the largest popularity ever. Not reserved only for United States anymore, lanbased poker tournaments became world wide phenomenon with popularity quickly growing in European countries, Asia and other continents in addition to United States of America.

It is not about World Series anymore, being still the most prestigious though. World Poker Tour (WPT) the original coordinated and broadcasted circuit of poker tournaments (held internationally but mostly in USA) on the globe, enjoys huge reputation all over the world with its popularity still growing like the amount of cities where it was held. EPT (European Poker Tour) and APT (Asian Poker Tour) that are alike World Poker Tour series of broadcasted poker tournaments that are held according to their description in Asia and Europe and their popularity is quickly growing. In addition latest phases of few online tournaments are held as live broadcasted events.

Final table excitement involving skilled and highly experienced pro poker players although frequently alike fortunate debutants draws every single day still more folks to try out the enchantment of the most common poker game the Texas Hold em. The major allurment to try poker is cash, adrenaline and the natural desire to become the winner. Unfortunately a lot of new enthusiastic players end up with having the adrenaline and desire but throwing away their money. This is induced by shortage of knowledge and as well seeing that TV networks compose tournaments that take several days into several hours giving the viewers feeling that any cards might win. It is right but some poker hands will not win often enough to consider them worth playing in some situations. If you are beginner you need to acquire more knowledge and practice. The best way is to start playing at poker sites that offer free poker cash to try them out. You are able to use it to acquire experience and if you have solid poker skills then you can use this free bonuses to qualify for live poker events online.

Most online poker sites give their players opportunity to qualify for the famous broadcasted live events in online satellites. Those ones frequently contain numerous phases enabling these card rooms the ability to offer satellites for as little as penny if not complimentary. Along with special no deposit poker bonuses at few poker sites you also get opportunity to qualify for broadcasted landbased poker events literally free no risk. That could save you thousands of dollars and gain thousand thousands. The buy-in to WSOP main event costs 10,000 USD, if you wish to enter World Poker Tour you have got to buy-in for at least 5,000 USD, European Poker Tour entries cost sort of 8,000 EUR and you can enter APT for Two and a Half Grand. Not even mentioning how much could you win in case that you will be able to squeeze into the money. Over six thousand players were competing last World Series Main Event with top 621 sharing prize money of over Fifty Million.

You should not directly enter costly broadcasted events in case that your bankroll is low or you miss the knowledge needed. Capitalise on free poker money and online satellites from online poker sites instead and you can end up playing for up to millions in hard cash. Certainly it really is not that easy to qualify but the whole knowledge that you obtain on a route is priceless.

If you are interested in further interesting info on online poker rooms check Casinator Gambling Portal - site with the best absolutely free online poker promotions and other incentives also with free no deposit poker bonuses. Players may as well find at this website list of online poker sites which offer both satellites to live events and free poker money no deposit required.

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Multicast Wireless?

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by Roberto Bell

Multicasting is the process of broadcasting a huge number of routing packets to multiple destinations with the use of fewer networks. Multicasting when used over wireless networks like cellular telephones is known as multicast wireless. As mobile companies all over the world upgrade their wireless networks to enhance the efficiency of new functions like mobile TV or IPTV, the bandwidth usage goes up dramatically, leading to the need for multicast wireless technology. Although the concept of wired multicasting, like ATM multicasting and IP multicasting, is still popular in some areas, it won't be very long before wireless multicasting takes over the world.

Universal Mobile Telecommunication System (UMTS) is the preferred architecture that will promote third-generation mobile telecommunication systems. UMTS is an offspring of the second-generation mobile telecommunication system (GSM). UMTS is geared to provide higher bandwidth radio access, especially for packet-data-based traffic, in addition to conventional voice services. UMTS can provide maximum bandwidths ranging from 64kb/s - 2Mb/s. Enabling UMTS for different and concurrent high-bandwidth users, thereby reducing cost, will require multicast wireless protocols to be in place.

Multicast wireless technology replaces the older technology with only a few infrastructural changes. To begin with, existing routers must be upgraded to include a specific multicast routing application in place of the older, traditional algorithms. When we speak of wireless multicasting, the most important medium of communication or broadcasting is the omni-directional antennas.

Multicasting is generally conducted through what is known as source-based multicast trees. The multicast tree operates on a number of algorithmic structures. The source-based mediums may need the receiver's addresses and topology data. DVRMP and MOSPF are some of the best examples of the algorithms that are traditionally used in the process, especially for video broadcasting. All wireless broadcasting or multicasting processes are guided by a bunch of multicasting network protocols.

Wireless multicasting technology has triggered a tremendous curiosity in the minds of technocrats across the world. As mentioned earlier, the main reason for this is the rise in the number of mobile service provides, as well as the new functions and applications that are being integrated into mobile networks and wireless Internet connections. Moreover, communication dysfunction is harmful for basic and necessary services like the military, so the introduction of multicast wireless has made staying connected both easier and more effective. Cheaper broadcasting means many television channels can reach out to millions across the globe via IPTV and mobile TV broadcasting. In retrospect, it is clear that the need for multicast wireless was always present, but the realization has set in a bit late.

The purpose of having a wireless multicasting procedure is to maximize the security levels that were often found lacking in wired multicasting. Don't be surprised if you see a constant growth in the quality of various broadcasting services now that they have wireless multicasting to fall back on.

Paul Benson writes on topics such as Multicast Wireless, Bluetooth and MMS for The Tech FAQ.

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Understanding Basic Terms in Indoor Fiber Optic Cable Installation

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by Colin Yao

Fiber optic cables are exposed to electrical, mechanical, chemical and environmental elements, so proper installation is critical for the long-term stability and survival of fiber cables.

Cable installation must also meet the NEC(National Electric Code) and local building codes. NEC indicates that fiber optic cables can be placed in the same raceway, cable tray or enclosure with CATV, telephone, communication circuits and Class 2 and 3 remote control signaling circuits.

Note that you should never put the fiber optic cable in the same enclosure that houses electrical terminations.

What are conduits?

Conduit is a tube or trough for protecting electrical or communication wires and cables. It may be a solid or flexible tube in which cables are run. They house and protect the fiber optic cables as well as any other type of data or communication transmission line.

Underground conduits are also called ducts and consist of one or more conduits spaced closely together. They are often buried directly in the ground in concrete casing. Duct lines terminate in underground vaults called manholes. Conduits are made of fiber, PVC, PE and other materials.

Above ground conduits are made of metal or nonmetal materials. They can be used in exposed or concealed locations aboveground.

Characteristics of a good conduit installation

1.Good mechanical properties to withstand the forces imposed by cable installations
2.Observes fiber optic cables minimum bending radius
3.No sharp edges or bends touches the fiber optic cables throughout the route
4.Meets current and future expansion requirements

What are cable trays?

A cable tray is an assembly of units made of metal or other noncombustible materials that form a continuous, rigid support for fiber cables. Cable trays are used throughout the industry and they greatly simplify the installation of fiber optic cables.

Cable trays come in several different types including ladder type, trough type, channel type and solid-bottom type.

Ladder type cable tray is a metal structure consisting of two longitudinal side rails connected by individual transverse members. The transverse members provide the support for fiber cables.

Trough type cable tray is also a metal structure. It consists of a ventilated bottom and has closely spaced supports within integral or separate longitudinal side rails.

Channel type cable tray consists of a one-piece ventilated or solid-bottom channel section.

Solid-bottom type cable tray is a metal structure that has no openings in the bottom. Integral or separate longitudinal side rails provide the support for the fiber cables.

What are pull boxes?

Pull boxes are used to break up long conduit lengths for easier and lower tension cable pulls.

Pull boxes are usually placed near conduit bends and in long straight runs. You should use at least one pull box after every second 90° bend and in long conduit spans.

When pulling cable out of pull boxes, ensure that the cable's minimum bend radius is always observed. Cable pulled through a corner pull box should first be pulled into a loop since the sharp corner of the pull box can easily damage the cable and the fibers.

Colin Yao is an expert on fiber optic communication technologies and products. Learn more about aerial fiber cable, optic cable aerial, aerial fiber optic cable on Fiber Optics For Sale Co.

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Compressing or archiving what is the difference?

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by Venderei Tikotzinski

Many people confuse the terms archiving and compressing. While there is some connection between the two they are actually completely two different things. Here is some more information about those terms.

Archiving is a term that usually describes the process in which files are packed into one or more files for backup or for storage for a later use. The word archiving is actually old and was also used back in the days where computers where not available. In the old days archiving meant taking physical files which were a collection of papers and documents putting them in boxes and then storing those boxes in a special place for later retrieval.

A good example of what archiving was used for back then is the archiving of legal documents such as contracts and tax documents. For example after completing the tax reports for a certain year the company has no use for the detailed tax files but the law requires it to save them for a certain period of time usually for 7 years. Most companies would then archive the tax files by simply taking all the relevant tax documents putting them in a box market accordingly and then storing the box in an archive facility usually owned and managed by a third party service company.

In the digital era archiving means the storage of electronic files for later retrieval. It also means that the archived documents are not expected to be used on a regular basis and for that reason they can be stored in a format that is less efficient for retrieval and processing but more efficient in managing a large archive. One such format is known as packing. Packing means that a large group of files such as the year tax documents from the previous example are packed into a single electronic file. The file is named accordingly and usually is very big.

Compressing is the process in which files are converted into a more efficient representation thus requiring less bytes for storage. Compressing is usually done in order to save space when needing to transfer files over a bandwidth limited network when sending files over email or when storing files for backup or future use.

Since archiving involves the process of packing a large number of electronic files into one packed file it also usually includes some sort of compression. Because packed files are very big and are basically stored for future use it makes sense to compress them. By compressing the files in an archive the archive packed file can be smaller and thus easier to manage and store. A smaller files requires less storage space allowing for cost savings.

Archiving does not have to include compression and compression can be done without archiving. When compressing an archive there are two main options for applying the compression mechanism. One is to compress each file just before it is packed into the archive. The other is to first pack all the files and then compress the single pack archive file. There are advantages and disadvantages to each method. In most cases the former is used.

You can read more at 7-Zip Venderei Tikotzinski is a business and Internet writer. Mr. Tikotzinski writes about his expertise in business and Internet. This article can be published as long as the resource box including the backlink is included.

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Care for Your Optical Disks

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by Andrew Watson

An optical disc is an electronic data storage medium that can be written to and read using a low-powered laser beam. Similar to the other eras, laser technology has also marked its place in the field of data storage also. Optical Disks (CDs and DVDs) provide a pleasure to us for storing and sharing photos, documents, movies and music. Now optical disks have wonderful data storage capacity of up to six gigabytes.

Like other storage media optical disks is no exception. This may happen that you insert your CD for checking few of your files and one or more of your file may refuse to open.

But before going for any solution, we first need to know what has happened exactly? Broadly there can be two categories in which the reasons of data loss can be divided: physical and logical.

Physical Reasons:

o Mishandling the optical disk.
o Development of the scratches over its surface where data is stored.
o Damage due to fire, humidity and high temperature.

Logical Reasons:

o Virus infection.
o Accidental deletion.
o Over compression.
o Improper shutdown of the system.

These are few of the examples through which data loss can happen to optical disks and you would require data recovery for the sake of retrieval of some mission critical data. So before anything can go wrong with these optical disks, you should have a brief idea about how can you care for the data on them:

o While cleaning your disk, use cleaning fluid or clean water and very mild soap.
o Always use the best quality anti-virus program to scan your system before inserting any disk into it for writing.
o While the disk is being burnt, don't ever shut down the system or terminate the program.
o Do not use sharp objects to prevent scratching, not even the disk has got stuck in the tray.

Being a removable and the cheapest storage media, optical disks are widely accepted among the users to store valuable data. They are also used as backup storage media. But due to one or other reasons (either physical or logical), user fall for the need of data recovery. When the lost data was high on the importance curve in his business or personal matters, then the reliable source of data recovery is vital.

Based on the root of dilemma, there are two possible way outs: data recovery services and data recovery software. As mentioned above for the physical basis, data recovery services would be a help for you and for the logical grounds, data recovery software will play a safe part.

Stellar Information System Ltd. is the leading company providing you both the options of data recovery. Data recovery services from these disks and other storage media like hard drives is provided in company's Class 100 Clean Room. Here data recovery experts work at their best level to recover the data from the physically crashed disks.

Data recovery software of Stellar are similar to the services in terms of quality. Data recovery from the windows compatible disks is possible through Stellar Phoenix Windows data recovery software. This data recovery software has several of the option which would allow you to get back your original data like raw file recovery. The 'Live Update' feature of this data recovery software gets the latest update of this software. This data recovery software will scan your media to extract the data from it.

Andrew Watson a student of Mass Communication doing research on data recovery software. He is also a freelancer for http://www.stellarinfo.com

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Importance of Computer Certification Courses in your career

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by abcotechnology.com

There are many paths to certification and the first step is to do some research. Spend some time defining your current skills, deciding where you want to take your career, and then look at the certifications that are applicable to your goals.

Measuring ones skills and expertise and having a metric to do so is necessary in today's highly competitive fast paced world. Computer certifications exist for a single purpose: to provide a measurable account of a specific set of skills and/or product knowledge. If you are an expert, a certification is proof. If you are not yet an expert, the path you must take to become certified will provide you with the tools to become one. Hence certification is what you need to prove your worth. You may be real good, but how will the world know that? What is the guarantee, proof or degree? Hence the need for certifications!

There is no universally accepted way to prepare for a job as an Information Technology (IT) Professional than through Microsoft Certifications. Although a bachelor's degree is often required and relevant work experience is very important, many people develop their computer skills while working in other fields. The continual study of new technologies is necessary to keep computer skills current. ABCO Technology has Microsoft Certified Trainers that can train students in obtaining Microsoft Certifications which will qualify them for a career advancement opportunity. ABCO has Microsoft Developed and Authorized comprehensive training courses for Professionals who develop and support real world solutions using Microsoft Technologies.

What does free online information technology computer certification training offer that would be beneficial for the student who plans on passing there IT certification exam on the first attempt? Free computer certification training can only take you so far. You will learn the basics but you will not know enough to pass a certification exam. Many Websites will give you free training in order to draw you in, so you will purchase some training material (study guides, online tutoring and practice exam questions).

Many computer institutes have been offering different kinds of online computer training programs to their students. These are specially designed, keeping the industry needs and requirements in mind. As more and more companies require high level and trained IT staff for their companies, it has forced many employees to take up such computer training programs that can improve their career growth in different areas. There are very few resources available online or classroom in which you will be able to find the appropriate certification exam training. Knowing how to take a test and apply the learning that you have acquired is an art that can be learned also. Information technology computer certification exam taking requires skills that you can easily pick-up by using the right exam training material.

Computer training courses can also be useful to those who have a keen interest in this area and wish to take it up as their profession. There are many programs that are offered for students who wish to specialize in different areas giving them good flexibility of learning at their own pace.

The Internet has an abundance of online resources of free and pay practice exam questions about information technology computer certification. There are many companies with high visibility websites that offer free practice exam and test questions to show that they are concerned about giving you some certification training. The practice exam questions that are more relevant to the actual certification exam will require a purchase. These websites are hoping that you will like the free practice test questions so you will want to purchase the detail ones that give you an explanation of the answer.

After attending just a few courses you will begin to develop strategies that can ultimately increase your office's performance drastically. The workflow design that Office allows can help you drive your company into maximum efficiency. After you graduate from a specialized course you can carry a Microsoft certified label that will assist you in gaining the positions you have always dreamed of. So why not jumpstart your new career or give yourself an edge over the competition by signing up for a Microsoft Office training course today!

If you would like to do computer training courses at ABCO Technology, then kindly free to visit our website:- http://www.abcotechnology.com/

Please feel free to visit our website for more information about Computer Courses, Computer Training, Computer Course Training or call us (310)237-5517.

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IT Service Call is a professional web design and database development company

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by Eddie Robortson

IT Service Call is a professional web design and database development company that is serving their clients of UK since 2004. Hence it's been 3 years, we are providing our creative, effective, professional, user friendly & search engine friendly web sites to the infinite prospective customers all over the UK.

We are reliable web design company that will design your web site in such a way that it will result in producing the good outcome. When designing the web site, our web designers take cares that a web design is complementing the web content so as a result, it can please the targeted population.

With us, you will get the rest assurance of Standard Compliance. Our strategic & certified web designers will carry out the validation of work in an attempt to make certain that their code complies with W3C standards for HTML & CSS and for the Web Content Accessibility Guidelines. Compatibility of the designed web sites in any of the web browser is the added advantage you will get with the IT Service Call.

Through our web design services, thousands of commercial and non-commercial organization's web sites have successfully ranked high in the major search engines, thus maximizing their business in the online community of the world.
If you get the feeling that your site is looking too tired to be get rejuvenated, than do rely on IT Service Call for your web design requirements, whether it has to be formulated Simple, Dynamic, and Ecommerce, Expandable, Corporate or Flash Animated. Our well-experienced web designers will design elegant websites for you at the most affordable rates.

Besides, Web Designing, our designers also specializes in other areas including: Web Development, Web Hosting, and Search Engine Optimization, Computer Repairs/IT Support, Computer Leasing, Internet Services and much more.

http://www.itservicecall.com

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