Introduction of network

A network is a collection of computers and other network devices are interconnected in order to be able to communicate with each other and exchange data.
With the computer network will be several benefits:

1. Sharing the Internet channel
2. Access to email, surf
3. Data sharing, documents, music, pictures, etc
4. Computer remotely from a network
5. Computer security against viruses, hackers. worms, a centralized
6. Play games online together
7. Cost savings in devices such as printers, storage media to be able to share

There are two types of tissue based on the size and the distance is a local area network (LAN) and wide area network (WAN).

LAN is a network of a set of network devices that connect adjacent as in the home, office, or school and campus. LANs allow users connected to share files, printers, or storage together.
Although only two computers or in a very large scale, the goal is that every user can share (sharing) information quickly and easily. So the LAN is generally limited to distances within a building or area that could communicate with each other quickly.

WAN is a group of computer networks in a large scale across the border geography,
such as inter-city or inter-state. A simple example of a WAN is the Internet network where all computers around the world can connect and communicate with each other (of course with certain limitations).
To be able to communicate with each other across a LAN to a WAN network is used the router with network protocol called TCP / IP.