Men have been sending and sharing data since ancient times. People from all generations know about postcards, letters etc. Computers came into existence and everything changed. Now lakhs of information are shared, sent or exchanged through computer networks. In a computer network, multiple paths connect different computers to share data. A system which is part of network is called Open System. Closed system is one which is not connected to a network. Computers in an office or building can be grouped to form a network. We call it Local Area Network. Metropolitan Area Network covers a geographically large area. Wide Area Network is spread across states or countries. Another one is Personal Area Network. We are all a part of some networks. It's a must to understand more. Please read the related presentation.

Gokul Pradeep

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