INTRODUCTION TO COMPUTER NETWORKS

Three centuries before the present, each marked with different dominance. The 18th century was dominated by the development of mechanical systems that accompanied the industrial revolution. The 19th century was the steam engine era. The 20th century, technology, radio, tv and the computer plays for the collection, processing and distribution of media information. Century 21 current or-information era, where the global computer network technology that can reach all areas of the world, the development of systems and technologies used, dissemination of information via internet, launching communications satellites and wireless communications devices / provider marks the beginning of the century millennium.

Since to his community dipasarkannya Internet and Windows95 operating systems by Microsoft Inc.., Connect several computers both personal computers (PCs) and servers with a network of this type of LAN (Local Area Network) to WAN (Wide Area Network) into a thing simple and ordinary. Similarly, the concept of "downsizing" and "lightsizing" aimed at pressing the budget (budget efficiency), especially computer equipment, the need for a computer network is one thing that can not be inevitable.

Understanding Computer Networks
-The relationship between 2 or more computers connected to cable or transmission media without wires (wireless)

Two computer unit connected to say if they can exchange data / information, share resources owned, such as files, printers, storage media (hard drives, floppy disks, cd-rom, flash disks, etc.). The data in the form of text, audio and video, moving through the media without cables or wires (wireless) to enable computer users in computer network can exchange files / data, print on the same printer and using hardware / software that connects the network together .

Each computer, printer or peripheral is connected in a network called the "node". A computer network at least consisting of two computer units or more, can amount to tens of computers, thousands or even millions of nodes that are connected to each other.

Computer Network Benefits
Computer network could not thrive without the benefit if large. Can you imagine a small business office with several PC units, or a close just like a computer - the computer is in Politeknik Caltex Riau is not connected in a network configuration. It would certainly be a lot of activities - activities that boring and ineffective, such as data rates have to use floppy disks, brought here for a printer there that want to print, can not send messages to the computers of friends and many more.

With the computer network will facilitate the exchange of data (resource sharing). Distance constraints for the data exchange can be answered by a computer network. System reliability can also be maintained because of the ease of copying files between computers. Practicality and efficiency could be improved employment because of the ease - the ease of which are presented with a computer network.

Another benefit of computer network systems is scalability, the ability to increase system performance gradually according to your needs and workload. Such as we have a data server is not able to handle the workload, and with our computer network to add a live data server. The savings will be sought for without the need to change the server the existing data.

There may have heard about the control and automation systems remotely capable of locking the gate, turn off the stove in the kitchen houses a computer at the office. All that can happen because of a computer network. With the computer network enables remote controlling of equipment - equipment that is connected to the computer network. We can do telnet access, login remotely thanks to a computer network.

Present era can be done long distance communication both voice and images via computer network. At the beginning - the beginning of computer networks appeared, people communicate through IRC so that only the text that we have received. As the speed of the computer network bandwidth can spend our voice and video, examples of applications easily as ICQ, yahoo chat etc.. Latest technology of telecommunication via computer networks is a VOIP (voice over internet protocol).

The Internet is the largest application running on a computer network. With the Internet we can obtain information from around the world, news, entertainment, games and more. We have TV or radio broadcast many use the Internet network services. Information system technology and multimedia is growing rapidly as the computer needs to support a reliable network.