Tuesday, 12 November 2013

A network of bus topology consists of a long single cable to whichall the computers and other devices are connected. Any node attached to the bus can send signals down the cable to all the nodes of the network, that means a bus is a broadcast medium. When more then one node starts sending data through the bus, they mix with each other and sent data become a garbage. This is called collision. To avoid collision there must be some agreement between the nodes so that when one computer starts to send data, other refrain themselvesfrom sending data. To ensure correct data communication, both ends of the cable is terminated by a special device called end terminator.
Ethernet bus topologies are relatevly easy to install and don’t require much cabling compared to the alternatives. 10 Base-2 (thin) and 10 Base-5 (thick) both were popular Ethernet cabling options for bus topologies. 
Advantages
1. Bus topology is inexpensive in installation
2. It requires less cable then other topologies
3. Good for smaller networks not requiring higher speed.
4. Easy to add system network.
Disadvantage
1. Out of date technology.
2. Difficult to troubleshoot.
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