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Given the following statements:

  1. Frequency Division Multiplexing is a technique that can be applied when a bandwidth of a link is greater than combined bandwidth of signals to be transmitted
  2. Wavelength Division Multiplexing (WDM) is an analogue multiplexing technique to combine optical signals
  3. WDM is a digital multiplexing technique
  4. TDM is a digital multiplexing technique

Which of the following is correct?

  1. $\text{i, ii, iii}$ and $\text{iv}$ are true
  2. $\text{i, ii, iii}$ and $\text{iv}$ are false
  3. $\text{i, ii,}$ and $\text{iv}$ are false; $\text{iii}$ is true
  4. $\text{i, ii,}$ and $\text{iv}$ are true; $\text{iii}$ is false
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Multiplexing is a technique to transmit multiple signals across a single data link.

Answer must be D

Multiplexing can be of three types:

  1. Frequency-division multiplexing (FDM) : analog signal
  2. Wave-division multiplexing (WDM) : analog signal (used in optical fibers)
  3. Time-division multiplexing (TDM): digital signals
  • In TDM, a single frame is made with interleaved digital signals from n devices. In TDM, the transmission rate of the multiplexed path is greater than the sum of the transmission rates of all sources.
Answer:

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