Data Communication and Computer Networks Objective Questions and Answers
Questions
1
Optical transmission mainly uses
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 ?
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
Answer: Option [A]
In FDM overlapping is not possible because of guard bands.
5
When useful bandwidth of medium exceeds the required bandwidth of signals to be transmitted we use
Answer: Option [A]
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