Ethernet is a standard developed by digital equipment corporation, xerox and Intel for interconnecting computers with in a small geographic area. This was later refined and standardized as IEEE standards 802.The standard specifies interconnection of computers using a bus. The physical layer is a shielded coaxial cables supporting a data rate of 10 million bits per second. The maximum length of the cable is 2.8km and the maximum number of nodes which can be connected is 1024.

The data link layer defines controlling access to the network and how data packets are transmitted between stations connected to the network. We observe that all the stations connected to the bus and each station communicates with the bus via a transceiver, that is, a combined and transmitted and receiver.Each