04-09-2014, 03:07 PM
What is Network? In one network more than one computer connected with each other through centralized device. They can share files and resources with each other. LAN LAN stands for Local Area Network. The scope of the LAN is within one building, one school or within one lab. In LAN (Hub), media access method is used CSMA/CD in which each computer sense the carrier before sending the data over the n/w. if carrier is free then you can transmit otherwise you have to wait or you have to listen. In multiple access each computer have right that they can access each other. If two computers sense the carrier on same time then the collision occur. Each computer, in the network, aware about the collision. Now this stop transmitting and they will use back off algorithm. In which random number is generated. This number or algorithm is used by each computer. Who has short number or small number, he has first priority to transmit the data over the network and other computers will wait for their turn. WAN WAN stands for Wide Area Network, in which two local area networks are connected through