In which of the following communication modes the multiplexer devices are used?
Correct answer: D. FDM (Frequency Division Multiplexing)
- A. Simplex
- B. Half-duplex
- C. Full-duplex
- D. FDM (Frequency Division Multiplexing)
Explanation
FDM is a technique for dividing a transmission medium (like a cable or radio spectrum) into multiple channels. Each channel carries a separate signal by using a different carrier frequency. Multiplexers are essential devices in FDM systems. They combine multiple signals onto a single medium by assigning different frequency bands to each signal. At the receiving end, a demultiplexer separates the signals back into their original channels.Incorrect Options Explained:Simplex and Half-duplex: Multiplexers are not typically used in simplex or half-duplex communication because these modes don't inherently require combining multiple signals.Full-duplex: While multiplexers can be used in some full-duplex applications, they are not always necessary for full-duplex communication.
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