Digital Communications Questions and Answers – Protocols

This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Protocols”.

1. Protocol is a set of
a) Formats
b) Procedures
c) Formats & Procedures
d) None of the mentioned
View Answer

Answer: c
Explanation: Protocol is a set of procedures and formats that entities use to communicate information.

2. The time required to transmit frame depends on
a) Frame size
b) Channel capacity
c) Frame size & Channel capacity
d) None of the mentioned
View Answer

Answer: c
Explanation: The time to transmit frame is given by the ratio of frame size and channel capacity.

3. Window given the number of
a) Bytes
b) Frames
c) Bytes & Frames
d) None of the mentioned
View Answer

Answer: c
Explanation: Window gives the number of frames or bytes that can be in transit unacknowledged.
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4. Routing is
a) Static
b) Dynamic
c) Static & Dynamic
d) None of the mentioned
View Answer

Answer: c
Explanation: Routing can be static and dynamic.

5. Routing is performed only centrally.
a) True
b) False
View Answer

Answer: a
Explanation: Routing is performed centrally and also in fully distributed way.
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6. Which is connection oriented and which is connection-less?
a) Datagrams, virtual circuits
b) Virtual circuits, datagrams
c) Datagrams
d) None of the mentioned
View Answer

Answer: b
Explanation: Datagram is connection-less and virtual circuits are connection oriented.

7. Which uses UDP?
a) Echo
b) Time
c) Domain name server
d) All of the mentioned
View Answer

Answer: d
Explanation: The protocols using UDP are echo, time, domain name server, network file system etc.
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8. Which uses TCP?
a) Simple mail transfer protocol
b) Simple network management protocol
c) Simple mail transfer & network management protocol
d) None of the mentioned
View Answer

Answer: a
Explanation: Some of the protocols using TCP are http, telnet, file transfer protocol, simple mail transfer protocol etc.

9. Which tells about low level transmission and framing?
a) V series
b) X series
c) G series
d) Q series
View Answer

Answer: c
Explanation: G series tells about level transmission, modulation and framing.
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10. Which tells about signalling?
a) V series
b) X series
c) G series
d) Q series
View Answer

Answer: d
Explanation: Q series tells about signalling.

Sanfoundry Global Education & Learning Series – Digital Communications.

To practice all areas of Digital Communications, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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