Which mode allows data to be transmitted in only one direction on a channel?

Which mode allows data to be transmitted in only one direction on a channel?

• A. Full duplex
• B. Simplex
• C. Half duplex
• D. Duplexing

Answer: (B)

Simplex is the mode where data flows in only one direction across a channel. In this setup, the sender transmits and the receiver only listens, with no path for the receiver to send data back on the same channel. This matches scenarios like traditional broadcast, where information goes from one source to many recipients without feedback. In contrast, full duplex allows both directions to transmit simultaneously, half duplex allows two-way communication but not at the same time, and duplexing is a general term for two-way transmission modes.

Simplex is the mode where data flows in only one direction across a channel. In this setup, the sender transmits and the receiver only listens, with no path for the receiver to send data back on the same channel. This matches scenarios like traditional broadcast, where information goes from one source to many recipients without feedback. In contrast, full duplex allows both directions to transmit simultaneously, half duplex allows two-way communication but not at the same time, and duplexing is a general term for two-way transmission modes.