Discussion
Which of the following communication modes supports two-way traffic but in only one direction at a time ?
Answer: C
The mode is Half Duplex.
In half-duplex communication, data can flow in both directions, but only one direction at a time; the parties take turns, as with a walkie-talkie.
Simplex allows transmission in one direction only, as in broadcast radio or a keyboard to a computer. Full duplex allows both directions at the same time, as in a telephone call. 'Three quarter duplex' is not a recognised mode.
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