Data Flow / Transmission modes

Transmission modes defines the direction of data between the communication devices.

Simplex

In this mode communication is unidirectional.it is like a one way street..only one device can send data and the other device can only receive data

Example

• keyboards
• Monitors
• Remote controls

Half duplex

In this mode both devices can send and receive data but not at the same time

Examples

• Walkie-talkie
• CB radios

Full duplex

In this mode both station can send and receive at the same time.The full duplex mode is like a two way street traffic flowing in both direction at the same time.

Examples

• Telephone networks