computer network

A computer network is a group of interconnected computers. Networks may be classified according to a wide variety of characteristics. This article provides a general overview of some types and categories and presents the basic components of a network.
Network Classification

The following list presents major categories used for classifying networks.

[edit] Scale

Based on the scale networks can be classified as Local Area Network (LAN), Wide Area Network (WAN), Metropolitan Area Network (MAN), etc. Also that(man) can be used in the world.

[edit] Connection method

Computer networks can also be classified according to the hardware technology that is used to connect the individual devices in the network such as Optical fibre, Ethernet, Wireless LAN, HomePNA, or Power line communication.

Ethernet uses physical wiring to connect devices. Often deployed devices are hubs, switches, bridges, and/or routers.

Wireless LAN technology is designed to connect devices without wiring. These devices use radio waves as transmission medium.

[edit] Functional relationship (Network Architectures)

Computer networks may be classified according to the functional relationships which exist among the elements of the network, e.g., Active Networking, Client-server and Peer-to-peer (workgroup) architecture.



http://en.wikipedia.org/wiki/Computer_network