Question

In _________ data transmission mode, messages can be sent in both directions, but only in one direction at a time.

• A. Simplex
• B. Half-duplex
• C. Full-duplex
• D. Extended duplex

Hint:

Half-duplex allows two-way communication, but only one direction at a time.

Answer 1

The Correct Option is B

In half-duplex data transmission mode, communication occurs in both directions between devices, but only one device can send data at a time. This means that when one device is transmitting, the other must wait until the transmission is complete before responding. 
Other transmission modes:

• Simplex: Data flows in only one direction.
• Full-duplex: Data flows simultaneously in both directions.

Half-duplex is commonly used in walkie-talkies and some network systems where bidirectional communication is necessary but simultaneous transmission is not possible.