Correct option is C
Correct Option – (c)
Introduction:
Fundamental Multiplexing Techniques in Telecommunications
Multiplexing combines multiple signal channels into a single transmission medium to maximize bandwidth efficiency.
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A. Space Division Multiplexing (SDM): Separates channels physically in space (e.g., individual wire pairs or multi-core optical fibers).
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B. Frequency Division Multiplexing (FDM): Divides total available bandwidth into non-overlapping frequency bands (e.g., analog radio broadcasting).
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C. Time Division Multiplexing (TDM): Allocates discrete time slots to different signals on a shared frequency channel (e.g., digital telephony).
Invalid terms:
NDM and
ADM are not foundational channel multiplexing methods.
Therefore, the valid basic methods are
A, B, and C only.
Information Booster:
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Wavelength Division Multiplexing (WDM): An optical variant of FDM that transmits multiple light wavelengths over a single optical fiber.
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Code Division Multiplexing (CDM): Assigns unique orthogonal mathematical codes to separate signals occupying the same time and frequency space (e.g., 3G cellular systems).
Additional Knowledge: FDM is primarily used for analog signals, whereas TDM is designed for digital signals where data stream bytes or frames are interleaved across time slots.
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