Basic methods of multiplexing channels include:

1.Space Division Multiplexing (SDM)

2.Frequency Division Multiplexing (FDM)

3.Time Division Multiplexing (TDM)

4.Network Division Multiplexing (NDM)

5.Access Division Multiplexing (ADM)

A1 and 2 only

B4 and 5 only

C1, 2 and 3 only ✓ Correct

D3, 4 and 5 only

Correct answer: (C) 1, 2 and 3 only

Explanation

The basic multiplexing methods are Space, Frequency and Time Division Multiplexing.

Space Division Multiplexing in Statement 1 separates channels along physically distinct paths.

Frequency Division Multiplexing in Statement 2 assigns each channel its own frequency band.

Time Division Multiplexing in Statement 3 gives each channel its own time slot on the line.

Network Division Multiplexing in Statement 4 is not a real multiplexing method.

Access Division Multiplexing in Statement 5 is likewise not a standard technique.

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