Data Communication and Networking MCQ with Answers

Data Communication and Networking MCQ with Answers

Data Communication and Networking MCQ with Answers pdf | MCQ on Data Communication for the preparation of IT examinations.

Are you looking for Data Communication and Networking MCQs with Answers? If so, you’ve come to the right place! This article focuses on providing a comprehensive set of questions and answers related to data communication and networking.

Data communication and networking are essential topics for anyone studying computer science, as well as professionals in the IT field, so it is important to have an understanding of these concepts.

Data Communication and Networking MCQ

What is Data Communication and Networking

Data communication and networking refer to the transfer of data from one device to another through a medium like cables, wireless signals or even satellites.

This process involves the transmission and reception of electronic signals that carry messages between devices. The purpose is to enable users to communicate with each other, share resources such as printers or files, and access remote systems.

Data communication is essential in today’s world because it facilitates fast and efficient exchange of information between systems. People can send emails, browse the internet, make phone calls or video chats thanks to this technology.

Networking goes beyond connecting devices; it allows people around the globe to share ideas, knowledge and experiences instantly. Data communication also includes security measures such as encryption and firewalls which protect sensitive information during transmission.

Networking has come a long way since its inception in the 1960s when computers were first connected for research purposes.

Data Communication and Networking MCQ with Answers

1. Communication System is a system or facility capable of providing ___ transfer between persons or types of equipment.
A) Digit
B) Bytes
C) Error
D) Information
Ans: D

2. ATM stands for ___.
A) Asynchronous transfer mode
B) Asynchronous transmit mode
C) Asynchronous travel mode
D) None of the above
Ans: A

3. In the sciences and engineering, the process of decomposing a function into simpler pieces is often called ___.
A) Fourier analysis
B) Fourier coefficients
C) Laplace analysis
D) Z- transformation
Ans: A

4. In the modulation process a high-frequency periodic waveform is called the ___.
A) Modulating signal
B) Carrier signal
C) Information signal
D) Data signal
Ans: B

5. The basic principle used in optical fiber is ___.
A) Reflection
B) Refraction
C) Bending
D) Total internal reflection
Ans: D

6. Frequencies in the range of about 1 GHz to 40 GHz are referred to as ___.
A) Carrier frequencies
B) Medium frequencies
C) Microwave frequencies
D) None of the above
Ans: C

7. ___ is an example of ground wave propagation.
A) Computer
B) AM radio
C) FM radio
D) Telephone
Ans: B

8. In ___ signaling, one logic state is represented by a positive voltage level, and the other by a negative voltage level.
C) Polar
D) Manchester
Ans: C

9. QAM stands for ___
A) Quadrature Angle Modulation
B) Quadrature Amplitude Method
C) Quadrature Angle Measure
D) Quadrature Amplitude Modulation
Ans: D

10. In delta modulation, the transmitted data is reduced to a ___data stream.
A) 1 bit
B) 2 bits
C) 3 bits
D) 8 bits
Ans: A

11. ___ defines Media Access Control (MAC) and Physical (PHY) layers specifications for wireless LANs.
A) IEEE 802.6.
B) IEEE 802.41
C) IEEE 802.22
D) IEEE 802.11
Ans: D

12. Peak attenuation occurs in the vicinity of ___ GHz due to water vapor and at frequencies below ___ GHz, the attenuation is less.
A) 22, 15
B) 24, 68
C) 10, 28
D) 60,100
Ans: A

13. Some operations performed by the receiver are:
i. Amplification of signal
ii. Demodulation
iii. Decoding
iv. Modulation

A) i, ii
B) i, ii and iii
C) ii and iv
D) i, iii and iv
Ans: B

14. ___and ___ forms of angle modulation.
A) Amplitude Modulation, Phase Modulation
B) Frequency Modulation, Phase Modulation
C) Amplitude Modulation, Frequency Modulation
D) Frequency Modulation, Pulse Code Modulation
Ans: B

15. Which of the following statements are correct?
i. In a burst error, only one bit is changed.
ii. Burst error means 2 or more bits in the data unit have changed from 1 to 0 or from 0 to 1.
iii. In error detection, we are interested only to see if any error has occurred or not, but we are not even concerned about the number of errors.
iv. CRC stands for cyclic redundancy chart.

A) i and ii
B) ii and iv
C) ii and iii
D) i, ii and iv
Ans: C

16. State True (T) or False (F)
i. Two key characteristics of the decision are the time and place that the decision is made.
ii. The term decision place refers to which node or nodes in the network are responsible for the routing decision.
A) i-T, ii-F
B) i-F, ii-F
C) i-T, ii-T
D) i-F, ii-T
Ans: C

17. Match the following
a) Thick coax i. Office cabling
b) Thin coax ii. Ethernets
c) CAT5 cable iii. Guided transmission medium
d) Twisted pair iv. High speed computer communication

A) a-iii, b-i, c-iv, d-ii
B) a-ii, b-i, c-iv, d-iii
C) a-iii, b-i, c-ii ,d-iv
D) a-i, b-iii, c-iv, d-ii
Ans: B

18. State whether the following statements are True (T) or False (F)
a. Spread Spectrum uses wideband, noise-like signals.
b. Spread spectrum signals are harder to jam (interfere with) than broadband signals.
c. Spread and narrowband signals can occupy the same band, with little or no interference.
d. The carrier of the direct-sequence radio stays at a variable frequency.

A) a-T, b-F, c-T, d-F
B) a-F, b-F, c-T, d-F
C) a-F, b-T, c-F, d-T
D) a-T, b-T, c-F, d-F
Ans: A

19. Which of the following are the key elements of a LAN?
i. Topology
ii. Transmission medium
iii. Wiring layout
iv. Medium access control
v. Modulation technique
vi. Repeater
A) i and iii only
B) ii and v only
C) i ,iii and iv only
D) i, ii, iii and iv only
Ans: D

20. ___ is concerned with ensuring that all frames are eventually delivered and possibly in order to a destination as they are sent from the source.
Ans. Error control

21. Stop and wait is a Full-duplex link protocol (True/False)
Ans. False

22. In Stop-and-Wait Automatic Repeat Request protocol adds a ___ to the stop-and-wait protocol.
Ans. The simple error control mechanism

23. In Stop-and-Wait Automatic Repeat Request ACK frame can also be corrupted and lost, it too needs ___ bits and a sequence number.
Ans. Redundancy

24. For m bits for the sequence number In Sliding window protocol the maximum size of the window is ___.
Ans. 2m – 1

25. The selective repeat protocol also uses two windows they are ___ window and the ___ window.
Ans. Send, receive

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