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Welcome to the Physical Layer MCQs Page

Dive deep into the fascinating world of Physical Layer with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Physical Layer, a crucial aspect of Networking. In this section, you will encounter a diverse range of MCQs that cover various aspects of Physical Layer, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Networking.

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Check out the MCQs below to embark on an enriching journey through Physical Layer. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Networking.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Physical Layer. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Physical Layer MCQs | Page 17 of 24

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Q161.
Which of the following allows devices on one network to communicate with devices on another network?

a.

modern

b.

gateway

c.

t-switch

d.

multiplexer

Discuss
Answer: (b).gateway
Q162.
RS-449/442-A/423-A is

a.

the ratio of the number of data units in error to the total number of data units

b.

a set of physical layer standards developed by EIA and intended to replace RS-232-C

c.

a check bit appended to an array of binary digits to make the sum of the all the binary digits

d.

a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression the resulting expression will not conform to the rules of construction and thus the presence of the errors is detected

Discuss
Answer: (b).a set of physical layer standards developed by EIA and intended to replace RS-232-C
Q163.
A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as

a.

Aloha

b.

modem

c.

Angle modulation

d.

Amplitude modulation

Discuss
Answer: (d).Amplitude modulation
Q164.
A modulator converts a _____ signal to a(n) _____ signal.

a.

digital; analog

b.

analog; digital

c.

PSK; FSK

d.

FSK; PSK

Discuss
Answer: (a).digital; analog
Q165.
Repeaters are often used on an 802.3 network to help strengthen the signals being transmitted. As with the length of segments and the number of segments, a limit exists as to how many repeaters can be used between any two nodes. What is the maximum number of repeaters that can be used?

a.

1

b.

4

c.

9

d.

12

Discuss
Answer: (b).4
Q166.
A modem that is attached to the telephone system by jamming the phone's handset into two flexible receptacles in the coupler?

a.

bridge

b.

gateway

c.

acoustic coupler

d.

time-division multiplexer

Discuss
Answer: (c).acoustic coupler
Q167.
Which of the following statements is correct?

a.

characteristic of LAN is unlimited expansion

b.

characteristic of LAN is low cost access for low bandwidth channels

c.

characteristic of the hub architecture of ARC-net is alternative routing

d.

characteristic of the hub architecture of ARC-net is directionalized transmission

Discuss
Answer: (d).characteristic of the hub architecture of ARC-net is directionalized transmission
Q168.
A modem is connected in between a telephone line and a

a.

network

b.

computer

c.

serial port

d.

communication adapter

Discuss
Answer: (d).communication adapter
Q169.
A smart modem can dial, hang up and answer incoming calls automatically. Can you tell who provides the appropriate instruction to the modem for this purpose?

a.

Telecommunications

b.

Error detecting protocols

c.

Communications software

d.

Link access procedure (LAP)

Discuss
Answer: (c).Communications software
Q170.
In a synchronous modem, the digital-to-analog converter transmits signal to the

a.

terminal

b.

equalizer

c.

modulator

d.

demodulator

Discuss
Answer: (b).equalizer
Page 17 of 24

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