Data Flow :
It is the process of transmission of data between two station.
It may occur in three types
It is one of the communication i.e. unidirectional
Here only one of the two devices can send data and other device can received the data at a particular time.
ex, keyboard and monitor act as simplex communication.
Half – Duplex
Here both station can transmit and received the data but not at same time
When one device is transmit then another device is receives and vice versa.
Here both the station can transmit and receives data simultaneously Both the stations can transmit the data at same time.