Computer network is a form of electronic communication. The network might either be a small  or a large number of computers which are linked at different places.  The network may be divided in two categories which is based on the operational area of the network.

• Local Area Network (LAN)
• Wide Area Network (WAN)

Local Area Network (LAN):

A Local Area Network is a small group of computers (generally about 3 to 50 terminals) interconnected together and located inside a single building of same organization or institution, or within a limited area.

All the terminals are connected with a main computer which is widely known as server.

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