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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 15 of 24

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Q141.
Which of the following is used for modulation and demodulation?

a.

modem

b.

gateway

c.

protocols

d.

multiplexer

Discuss
Answer: (a).modem
Q142.
Which of the following types of channels moves data relatively slowly?

a.

wideband channel

b.

voiceband channel

c.

broadband channel

d.

narrowband channel

Discuss
Answer: (d).narrowband channel
Q143.
Which of the following device is used to connect two systems, especially if the systems use different protocols?

a.

hub

b.

bridge

c.

gateway

d.

repeater

Discuss
Answer: (c).gateway
Q144.
The synchronous modems are more costly than the asynchronous modems because

a.

they produce large volume of data

b.

they contain clock recovery circuits

c.

they operate with a larger bandwidth

d.

they transmit the data with stop and start bits

Discuss
Answer: (b).they contain clock recovery circuits
Q145.
The cheapest modems can transmit

a.

100 bits per second

b.

300 bits per second

c.

600 bits per second

d.

900 bits per second

Discuss
Answer: (b).300 bits per second
Q146.
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?

a.

Modem

b.

Interface

c.

Attenuation

d.

Teleprocessor

Discuss
Answer: (a).Modem
Q147.
Demodulation is a process of

a.

performing data description

b.

converting analog to digital signals

c.

converting digital to analog signals

d.

multiplexing various signals into one high speed line signals

Discuss
Answer: (b).converting analog to digital signals
Q148.
Demodulation is the process of

a.

converting digital signals to analog signals

b.

converting analog signals to digital signals

c.

dividing the high-speed signals into frequency bands

d.

combining many low speed channels into one high speed channel

Discuss
Answer: (b).converting analog signals to digital signals
Q149.
A devices that links two homogeneous packet-broadcast local networks, is

a.

hub

b.

bridge

c.

repeater

d.

gateway

Discuss
Answer: (b).bridge
Q150.
The physical layer, in reference to the OSI model, defines

a.

the virtual circuit interface to packet-switched service

b.

the interface between the X.25 network and packet mode device

c.

data link procedures that provide for the exchange of data via frames that can be sent and received

d.

All of the above

Discuss
Answer: (b).the interface between the X.25 network and packet mode device
Page 15 of 24

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