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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 18 of 24

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Q171.
Which of the following connectivity devices is used to extend a network on a purely mechanical basis?

a.

Active hub

b.

Gateway

c.

Router

d.

Switch

Discuss
Answer: (a).Active hub
Q172.
Who invented the modem?

a.

AT & T Information Systems, USA

b.

Digital Equipment Corpn.

c.

Wang Laboratories Ltd.

d.

Apple Computers Inc.

Discuss
Answer: (a).AT & T Information Systems, USA
Q173.
Propagation time is equals to

a.

Distance/Propagation speed

b.

Propagation speed/Bandwidth

c.

Message size/ Bandwidth

d.

Bandwidth/Queuing time

Discuss
Answer: (a).Distance/Propagation speed
Q174.
Period is the inverse of

a.

Frequency

b.

Phase

c.

Amplitude

d.

Signals

Discuss
Answer: (a).Frequency
Q175.
The black and white TV is an example of

a.

non periodic composite signal

b.

periodic composite signal

c.

periodic simple signal

d.

None of the above

Discuss
Answer: (a).non periodic composite signal
Q176.
The level of the signal is inversely proportional to the

a.

Reliability of a system

b.

Efficiency of a system

c.

Accuracy of a system

d.

Bandwidth of a system

Discuss
Answer: (a).Reliability of a system
Q177.
The Nyquist formula gives us any signal level while Shannon capacity gives us the

a.

Lower Limit

b.

Upper Limit

c.

Specific signal level

d.

Both b and c

Discuss
Answer: (b).Upper Limit
Q178.
Increasing the levels of a signal may reduce the

a.

Reliability of the system

b.

Efficiency of the system

c.

speed of system

d.

Frequency of system

Discuss
Answer: (a).Reliability of the system
Q179.
If signal does not change at all, its frequency is

a.

Zero

b.

Maximum

c.

Infinite

d.

None of Above

Discuss
Answer: (a).Zero
Q180.
A period of 100 ms in microseconds would be equals to

a.

103us

b.

105us

c.

107us

d.

109us

Discuss
Answer: (b).105us
Page 18 of 24

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