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Data Communication and Computer Networks Objective Questions and Answers

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Multichannel Data Communication multiple choice questions and answers set with five mcqs for NIELIT, BCA, B.Sc. MCA, M.Sc(IT), BE, B.Tech, CCNA, MCSE exams. Each quiz objective question has 4 options as possible answers. Choose your option and view the given correct answer.
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(1) Optical transmission mainly uses
[A] WDM
[B] FDM
[C] TDM
[D] CDM

Comment

Answer: Option [C]

In optical transmission many low rate digital signals can be time division multiplexed.

(2) Which of the following is necessary to use for separating channels in FDM ?
[A] time slots
[B] band pass filters
[C] differentiation
[D] none of these

Comment

Answer: Option [B]

Band pass filter is necessary to use for separating channels in FDM. A Band Pass Filter allows to pass a specific range of frequencies. During transmission it blocks lower and higher frequencies.

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(3) Guard bands increase the bandwidth for
[A] FDM
[B] TDM
[C] CDM
[D] None of these above

Comment

Answer: Option [A]

In FDM overlapping is not possible because of guard bands.

(4) For separate channels in TDM, it is necessary to use
[A] time slots
[B] bandpass filters
[C] differentiation
[D] none of the above

Comment

Answer: Option [A]
(5) When useful bandwidth of medium exceeds the required bandwidth of signals to be transmitted we use
[A] frequency division multiplexing
[B] time division multiplexing
[C] code division multiplexing
[D] none of the above

Comment

Answer: Option [A]

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DATA COMMUNICATION & COMPUTER NETWORKS – MULTIPLE CHOICE QUESTIONS AND ANSWERS | 250 MCQS

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