Multiple choice general knowledge science & technology

Unlike CB radios, cell phones use two frequencies, one for talking and the other for listening. This is:

  1. half-duplex communication

  2. multiple-duplex communication

  3. full-duplex communication

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Full-duplex communication allows simultaneous two-way transmission and reception, which is what enables cell phone users to talk and listen at the same time. Half-duplex requires taking turns (like walkie-talkies), while 'multiple-duplex' is not a standard communication term. This simultaneous communication capability is a key difference between cell phones and traditional radio systems like CB radios.

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