Direction of Data Flow:

Communication between two devices can be Simplex, half duplex, or full duplex.

Simplex:

In Simplex mode Data flow one side only In this type device A send data to device B but device B not able to send data to device A.

In our daily life we use TV cable connection is an example of simplex data flow.

Half Duplex

In Half Duplex mode Data flow both sides. In this type device  A and device B send data to each other  but when “A” send some data device  “B”  not send data and when device “A” send data device “A” not send data.

In our daily life we see police man use wireless phone/ walky talky is an example of Half Duplex data flow.

Full Duplex

In Half Duplex mode Data flow both sides. In this type device  “A” and device “B” send data & receive data same time.

Mobile phone is an good example of full duplex data flow.