Local Area Network is restricted to the limited geographic coverage of a few kilometers. LAN’s provide communication with in a building or a campus. LAN is used to connect the computers and other network devices that the devices can communicate with each other to share the resources. Transmission rate in LAN range from 10 M Bps to 1 G Bps, and increasing data continuously. The most conman communication links used in LAN are twisted pair, coaxial cable and fiber optics.