Methods of electronic
communication
BTEC National
Simplex
• Simplex describes data transmission
which is only one way
Sender
Receiver
Half-Duplex
• Half-duplex describes data transmission that is two-way,
just not at the same time. Each device must wait until the
other has finished before they can transmit successfully.
Sender
Receiver
Receiver
Sender
Full-Duplex
• Full-duplex describes data transmission
which can be sent 2 way at the same time.
each device can send and receive at the
same time
Sender/Receiver
Sender/Receiver