CISCO CCNA 200-301 Q70

What is the term used for the Ethernet communication mechanism by which hosts can send and receive data simultaneously?

A. full-duplex
B. multiplex
C. half-duplex
D. duplex

Correct Answer: A

Explanation:
Full-duplex communication occurs when workstations can send and receive data simultaneously. To support full-duplex communication, both communicating hosts should be configured to transmit in full-duplex mode. With the use of full-duplex communication, the bandwidth can effectively be doubled. Hubs are not capable of handling full-duplex communication, and you need a dedicated switch port to allow full-duplex communication.

Half-duplex is the term used for the Ethernet communication mechanism when hosts can send or receive data, but not simultaneously.