_____ mode allows transmission in either direction but not simultaneously.
2021
_____ mode allows transmission in either direction but not simultaneously.
- A.
Duplex
- B.
Half Duplex
- C.
Simplex
- D.
Half-Simplex
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Correct answer: B
Answer: Half Duplex allows transmission in either direction but not simultaneously.
Simplex — one-way only; example: TV broadcast or a keyboard sending data to a computer.
Half duplex — two-way but not at the same time; devices take turns transmitting; example: walkie‑talkies or a shared Ethernet hub.
Full duplex (Duplex) — two-way simultaneously; example: telephone calls or modern switched Ethernet links.
Note: The term "Half-Simplex" is not standard; use "Half Duplex" to describe two-way non-simultaneous transmission.