Multiple choice

Gaurd bands increase the bandwidth for

  1. FDM

  2. TDM

  3. Both (1) and (2)

  4. None of these
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A Correct answer
Explanation

Guard bands are unused frequency ranges placed between channels in Frequency Division Multiplexing (FDM) to prevent interference (crosstalk) between adjacent channels. They increase the total required bandwidth because each channel occupies more spectrum than its signal bandwidth alone. Time Division Multiplexing (TDM) uses time slots, not frequency bands, so guard bands don't apply to TDM.

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