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Data Flow ( Simplex , Half-duplex , or Full-duplex )

 Hey Guys 

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

Simplex Mode - Only one of two devices can transmit and the other can only receive.

Half duplex - Each device can both transmit can transmit and receive but not at the same time. When one device is sending the other can only receive.

Full-Duplex - Both devices can transmit and receive simultaneously.

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