There are three possible ways of data exchange- 1)Simplex-The signal be sent away in unidirectional mode. This indicate the signal is sent away form the resource to the destination merely. The signal movements in single direction only. E.g. television or radio transmission. 2)Half-Duplex - Contrast to simplex communication, half duplex message authorized the traffic to travel in mutually directions. Half duplex merely approved the signal to pass through both direction but at the same time. This way that the signal have to be sent out first and finish the session as of a place and then simply the reception signal be able to be sent in and the session end from a station. Half duplex only authorized an only signal stream in one method or direction at an instant. Full-Duplex transmission – It be able to function or effort in two-way course at a similar time. For the reason that of this, proficient full duplex enlarge the act of the networks. It can be sent and receive at the same without any problem. Full Duplex make use of two couple of wires where permit the station to transmit and obtain signal at any occasion. Full Duplex authorized he signal stream in mutually direction at the same time.