Author : princy shahClient-server computing or networking is a distributed application architecture that partitions tasks or work loads between service providers (servers) and service requesters, called clients

The term client-server refers to a popular model for computer networking that utilizes client and server devices each designed for specific purposes The client-server model can be used on the Internet as well as local area networks (LANs) Examples of client-server systems on the Internet include Web browsers and Web servers, FTP clients and servers, and DNS

Client and server device:

Client devices are typically PCs with network software applications installed that request and receive information over the network Mobile devices as well as desktop computers can both function as clients

A server device typically stores files and databases including more complex applications like Web sites Server devices often feature higher-powered central processors, more memory, and larger disk drives than clients

Client and server Application:

Client-server describes the relationship between two computer programs in which one program, the client program, makes a service request to another, the server program Standard networked functions such as email exchange, web access and database access, are based on the client-server model

The client-server model has become one of the central ideas of network computing Many business applications being written today use the client-server model So do the Internet’s main application protocols, such as HTTP, SMTP, Telnet, DNS

A client computer and a server computer are usually two separate devices, each customized for their designed purpose For example, a Web client works best with a large screen display, while a Web server does not need any display at all and can be located anywhere in the world However, in some cases a given device can function both as a client and a server for the same application Likewise, a device that is a server for one application can simultaneously act as a client to other servers, for different applications

The most basic type of client-server architecture employs only two types of hosts: clients and servers This type of architecture is sometimes referred to as two-tier It allows devices to share files and resources The two tier architecture means that the client acts as one tier and application in combination with server acts as another tier

Comparison to peer-to-peer architecture:

Another type of network architecture is known as peer-to-peer, because each host or instance of the program can simultaneously act as both a client and a server, and because each has equivalent responsibilities and status

Client-server is just one approach to managing network applications The primary alternative, peer-to-peer networking, models all devices as having equivalent capability rather than specialized client or server roles Compared to client-server, peer to peer networks offer some advantages such as more flexibility in growing the system to handle large number of clients Client-server networks generally offer advantages in keeping data secure

Advantages:

- All the data is stored on the servers, which generally have far greater security controls than most clients Servers can better control access and resources, to guarantee that only those clients with the appropriate permissions may access and change data

- Since data storage is centralized, updates to that data are far easier to administer than what would be possible under a P2P paradigm Under a P2P architecture, data updates may need to be distributed and applied to each peer in the network, which is both time-consuming and error-prone, as there can be thousands or even millions of peers

Disadvantages:

- Traffic congestion on the network has been an issue since the inception of the client-server paradigm As the number of simultaneous client requests to a given server increases, the server can become overloaded Contrast that to a P2P network, where its aggregated bandwidth actually increases as nodes are added, since the P2P network’s overall bandwidth can be roughly computed as the sum of the bandwidths of every node in that network

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Author : Tape4backup The Digital Data Storage is a highly reliable tape storage format which was launched in the last decade of twentieth century HP DDS-4 C5718A tape combines huge data storage capacity and delivers inimitable performance The HP DDS-4 tape format offers cheapest price per gigabyte The DDS technology versions DDS4 and DDS5 tape are extensively used by the large enterprises This is because these tapes provide extreme protection to the user’s data along with excessive storage capacity The DDS4 tapes include Hewlett-Packard (HP) C5718A, Maxell 200028, Sony DGD150PWW, Fuji 26047350, Quantum CDM40, IBM 59H4456, and Imation 40963 All these tapes feature modern technologies to provide error-free data storage cartridges to the customers
The HP DDS-4 tape is a huge capacity magnetic data storage format The HP DDS4, part number C5718A, combines numerous technologies to deliver ultimate protection to the user’s precious data The HP DDS4 tape is an ideal solution for high-volume backup and archiving The HP C5718A backup tape serves with enhanced durability and reliability These tapes are specially designed to support the large businesses which require extreme reliability for their precious data The media recognition system used by the HP DDS4 tape helps in verifying the data format instantly The process of helical scanning is utilized by the HP C5718A tape to reduce error rate during data recording The media of HP DDS-4 C5718A tape adds up a non-magnetic layer that is comparatively thinner than the one featured by the DDS-3 tapes This non-magnetic layer makes the tape’s surface extremely smooth and maximizes its durability The HP DDS4 tape has a strong and tough cartridge design which prevents it from damage and enhances its durability
The HP DDS4 tape has great data storage capacity The tape stores data up to 20 GB (native) It can also store data up to 40 GB in compressed mode The advanced superfine metallix technology featured by the HP C5718A tape decreases the natural demagnetization and rectifies the recording density The HP DDS4 tape transfers the data at a speed of 3 MB/s in native and 6 MB/s in compressed mode The archival life of the tape is thirty years The HP DDS4 tape does two thousand head passes and minimum of one hundred full backups in its lifetime The length of the tape is one hundred and fifty meters The HP DDS4 tape can be used with all the DDS4 drives
The HP DDS4 tape offers huge data storage capacity and inimitable performance The HP DDS-4 C5718A tape is extremely durable and is highly recommended by the large enterprises The DDS data tapes are also preferably used by the home users as well as the educational institutes because the DDS technology provides cost-effective data tapes along with huge data storage capacity The leading brands of the world including Hewlett-Packard (HP), Sony, Maxell, Fuji, IBM, Imation and many others are manufacturing DDS tapes from the time it was introduced The DDS tapes are compatible with all the known softwares and operating systems The HP DDS4 tape offers huge data storage capacity and inimitable performance. The HP DDS-4 C5718A tape is extremely durable and is highly recommended by the large enterprises. Tape4backup.com provides the finest quality DDS-4 data tape cartridges at the most economical price.

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Author : Wendy MoyerWhen printer ink cartridges were introduced in 1984, they changed the face of office and home printing Because it was no longer necessary to insert messy toner cartridges or change ribbons the printing process became much cleaner and more reliable

Immediately before the advent of printer ink cartridges and the ink jet system, most home and office printers used the dot matrix method

Printing results, although good for their times, was nowhere near as crisp and sharp as it is today Back then you could only print in black or red When the printing quality deteriorated it was time to change your ribbon This often left you with printer ink smudges on your hands and clothes

Then, when the paper ran out, you had to put a pile of semi-attached paper - perforated on the sides - behind your printer and then feed it into a pickup mechanism before you could resume printing

But you weren’t done, yet After the printing job was complete you still had to separate the sheets and tear the sides off each individual sheet It was a long and laborious process

It’s no wonder that once inkjet technology became available and cartridges with high quality printer ink hit the streets it only took six short years before this process became the norm Today not only can you print black and white documents, you can print in full color and print photographs and graphics as well

When the paper runs out you just fill up the paper bin No guiding, no separating Just fast, efficient printing that rivals a traditional printer in quality

Thanks to the development of high quality printer ink cartridges schools and businesses worldwide can now have their everyday printing needs met and also have choices as to the types and sizes of media they’d like to print on

One similarity between printer ink cartridges and dot matrix ribbons still remains, though

That is each printer uses refills specific to the brand and printer Most printers use one cartridge for black and another for color, although some use separate cartridges for each of the primary colors

Every printer manufacturer recommends that their own brand of printer ink cartridge is used in their printers However, you can save money by either refilling their cartridges yourself or buying remanufactured cartridges that have been refilled with printer ink

If you choose to refill your cartridges yourself you can buy a low priced kit and do it at home, although the process can be a bit messy

Your alternative would be to purchase an ink jet cartridge that has been remanufactured That would be an original printer ink cartridge that’s been taken apart, inspected, refilled with high quality printer ink, and tested before being offered for sale

These cartridges are guaranteed by the remanufacturer, cost less than OEM cartridges, offer the same high quality as original equipment manufacturer cartridges and are safe to use

Another more affordable alternative to an OEM cartridge is a compatible printer ink cartridge - one that has been manufactured to the same specifications as an OEM cartridge To find a well established, affordable source for printer ink cartridges go to http://www.Prink.co.uk

Wendy Moyer is a professional writer.

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Author : Bai ZijianThe XBOX 360 has become one of the most widespread video game consoles in the world There are a lot of people who just cannot live without the game From first time gamers to hardcore enthusiasts, the XBOX 360 has become a must for a lot of people But one of the drawbacks of the machine is that it causes a lot of problems

This is one of the main reasons why a lot of people hesitate to buy the game It is also one of the reasons why the console is a difficult piece to handle The Microsoft Company can face a law suit due several of the errors in the machine that it has tried to hide But luckily the main errors of the gaming machine have been sorted out One of them is the XBOX 360 2 red lights

The 2 red light is caused by an overheating issue The motherboard in this case intakes a lot of heat from the console unless it becomes a very complicated case The motherboard can bend until the solders become loose This can cause the 2 Red Light error There are many ways to stop this overheating One of the ways to prevent this overheating is to employ a cooling fan This will keep the XBOX 360 cool and allow it not to get heated But what can you do if the XBOX 360 has already experienced such an error? These are some steps you should follow in case your console starts showing the error

There is no way for the fix without opening the console Therefore it is always advised to give it to the XBOX Help Center If you have a warranty, then there is no better option than to take it to the Microsoft Customer care for repair They will do it for free But if your warranty has run out, then it is a good idea to get it repaired by yourself This is because for the fix, Microsoft will charge about a $140 This is not required to be paid if you can repair the XBOX by yourself For this you have to first, open the console and apply thermal paste on the CPU and the GPU After you have done that, you should replace it with a new paste

You should also think of buying a thermostatic cooling adaptor or a better fan that would help to make a good cooling effect Remember that if you have to have an fix, then you need to make proper cooling arrangements for your console The XBOX 360 does not come with the fan at the proper places; at least older versions of the machine do not come with the fan at the proper places But it is possible to have a proper fan so that you do not have to suffer for a long time for an XBOX 360 2 red lights fix in the newer versions of the gaming console

As cooling is an important part of your XBOX error fix, you have to take care of that before you can go for other alternative sets of help But you can always go to Microsoft Help Center and ask for help They will either sort your problem then and there or ask you to deposit your console for a few weeks Find out all about fixing Xbox 360 RROD Bai Zijian’s website talks more about the Xbox RROD in detail and has tips on how to handle with it.

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Author : Bai ZijianThe XBOX has become a very popular means of playing games in the present day world There are very few homes which do not have Microsoft XBOX 360 This is one of the most common gaming consoles that we have today This is because of its surprisingly simple features and all those exciting features that come with it

This goes a long way saying that the XBOX is not only cheap; it also has a lot of exciting games that can only be achieved if you buy one of those boxes yourself But while you may buy a perfect box, you might have problems using its features These features might include XBOX wireless problems Here are a few solutions to one of the XBOX wireless problems

One of the most common XBOX wireless problems to face with the wireless is the red light which becomes switched on when the wireless adaptor is at the back of the XBOX This can result in stopping off the game altogether This is a very big problem, but do not worry, you can get it fixed There is the possibility of a few solution options These should work

For instance, you should first check your adaptor There might be something wrong with it You might also find problems with the faulty connection in the system or the cable This might also be a problem with the router

For the problem with your router, you have to first check whether it is an A, B or G router For the adaptor works only with these types If the router is of another kind, then you might as well try changing it to one of these types The frequency on the wireless channel should be settled to some frequency The frequency should generally be on Channel 6 This is the signal they can carry

The next step which you should take in solving this XBOX wireless problem is the disconnection of the adaptor Then you should try to reboot the console Then with your power off, try to reconnect it This process should work But in spite of the best efforts, if you cannot retrieve your adaptor, then your adaptor is the bad one

In case, your adaptor turns out to be bad, there is no other option except to buy a new one This will save you of all the XBOX wireless problems of the bad adaptor This is one simple way in which you can solve your XBOX wireless adaptor problems There are other problems also which require a slightly different approach to the XBOX problem rather than this one However this one basic process which will help you to solve the problem of the red light in the functioning of the wireless adaptor

In case your XBOX continues to give you pains even after your trying to fix it up, you might have to send it for being repaired There are a lot of cheap and quality services available that help to fix up your XBOX for efficient prices The fact is that Microsoft charges a whole lot of money for their services so try out other quality services as well Find out all about fixing Xbox 360 RROD Bai Zijian’s website talks more about the Xbox RROD in detail and has tips on how to handle with it.

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Author : Amy NuttSociety’s technological advancements have grown significantly over the years Electronics devices such as telephones, cell phones, radios, CD and DVD players, televisions, and computers are products that are used in every household These items are just a few of the many electronic devices that can cause serious environmental damage due to their toxic components

Electronics that are in need of disposal are referred to as e-waste, or electronic waste Because of the advancement of electronic products, there has been a growing concern about the hazards of electronic waste Some of these concerns include: improper disposal of toxic materials, health and safety concerns for people disposing of these items, as well as dangers to the soil and water supply

For instance, electronics are made using a considerable amount of toxic substances such as lead, cadmium, aluminum, zinc, copper, and plastics which can all leak poisonous material in the ground and water These environmental concerns have resulted in the establishment of electronic recycling facilities and industries who take old electronics such as computers for the purpose of recycling and safe disposal

Electronics containing materials such as metals, plastic, are valuable to the recycling companies Disposing of electronics through a recycling company will result in fewer electronic devices going into landfills and lower carbon emissions

Recovering Raw Materials: Recycling electronics involves recovering raw materials from the electronic equipment Materials such as steel, copper, wires, aluminum, brass, plastics, glass,etc , are extracted and sold to smelters so they can create raw materials

Depending on the type of metal being extracted, they can be processed and used in products required by such businesses as the steel, construction and cement industry Plastics and wood can be used as fuel to provide heat to industrial furnaces which converts to steam Metals such as copper are sold to metal refineries

Plastics: Plastics from such items as computers, computer mice, and keyboards, are sent through shredding processes and machine sorted They are then sent to other recyclers for further processing

Larger Electronics: Items such as televisions and computer monitors are dismantled by hand The leaded glass cathode ray tubes are removed and disposed of safely Plastics, copper, and circuit boards are removed, separated, and processed

Hazardous Items: Toxic items are removed from electronic devices and disposed of safely Toxic substance can include leaded glass, rechargeable batteries, non-rechargeable batteries (i e alkaline, lead acid, cell batteries) mercury in lamps and switches, parts containing polychlorinated biphenyls, as well as ink and toner cartridges The remaining non toxic materials are processed and the recyclable materials are recovered

The materials are shredded and separated according to type For instance, they can be divided into such materials as steel, copper, aluminum, and plastic

Refurbished Electronics: There are now many companies that acquire used computers, repair and update them, and resell them at a much lower price This is a great way to keep electronics out of landfills and make technology more affordable

Donate Your Computer: If you are getting rid of your old computer because of a recent upgrade, consider donating it to charity Many schools and non profit organisations are in need of computers There are companies and businesses that will take your computer, refurbish it, and donate it to a needy cause Make sure your computer is wiped clean of all information before donating it Donating your computer helps the community and the environment

We are fast becoming a technology dependent society When it comes to protecting and conserving our environment, we have to adapt and change our technological practices to ensure a sustainable future Recycling electronics is a great way help the planet Know that repairing a computer or laptop repair is not cheap, but it can be cheaper than having to replace the computer. Similar if you have a network installation in Toronto or Wireless network installation. If you run into these situations, you will need to hire a onsite computer repair service in Hamilton, Ottawa, Montreal visit us.

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