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Computer Networks & Data Communication Multiple Choice Questions with Answers

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(1) The exact format of frame in case of synchronous transmission depends on whether transmission scheme is :
[A] digital
[B] analog
[C] either character oriented or bit oriented
[D] none of these above

Comment

Answer: Option [C]

The exact format of frame in case of synchronous transmission depends on whether transmission scheme is either character oriented or bit oriented

(2) For carrying digital data over long distance using either analog signal or digital signal at approximately spaced points, we must have
[A] amplifiers
[B] repeater
[C] switch
[D] either amplifier or repeater

Comment

Answer: Option [D]

In case of long distance transmission we use amplifier or repeater. An amplifier enhances the strength of input signal. On the otherhand repeaters receives a signal and retransmits the same signal after increasing the power.

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(3) A digital channel implies that the channel
[A] is digitized
[B] is carrying digital data
[C] is without carrier
[D] none of these above

Comment

Answer: Option [B]
(4) Which of the following is not a guided transmission line ?
[A] Twisted pair
[B] Coaxial cable
[C] Optical fiber
[D] Laser beam

Comment

Answer: Option [D]

Laser beam is a unguided transmission medium without wires. The receiver must be in the line of sight to receive the signal.

(5) The highest data rate is provided by which of the following medium ?
[A] Coaxial cable
[B] Optical fiber
[C] Microwave
[D] None of these above

Comment

Answer: Option [B]

The highest data rate provided by optical fiber.

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