Transmission Modes in Data Communication

Transmission Modes:

It indicates the direction of data flow between two linked nodes. There are three types of transmission modes as stated below :

• Simplex
• Half-duplex
• Full duplex

1. Simplex: In this mode, data travels in one direction only. Between two communicating devices, one is always the sender and the other is always the receiver. Data can flow from sender to receiver only.
Example: From keyboard to CPU communication.

2. Half-duplex: In this mode, data can travel in both directions but not simultaneously. When one node transmits the other node can only receive and vice versa.
Example: Walky-Talky communication.

3. Full-duplex: In this mode, data can travel in both directions simultaneously. Both nodes can transmit and receive simultaneously.
Example: Telephone communication