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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 4 of 24

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Q31.
A _________ sine wave is not useful in data communications; we need to send a _______ signal.

a.

composite; single-frequency

b.

single-frequency; composite

c.

single-frequency; double-frequency

d.

none of the above

Discuss
Answer: (b).single-frequency; composite
Q32.
The _____ of a composite signal is the difference between the highest and the lowest frequencies contained in that signal.

a.

frequency

b.

period

c.

bandwidth

d.

amplitude

Discuss
Answer: (c).bandwidth
Q33.
A(n)_________ signal is a composite analog signal with an infinite bandwidth.

a.

digital

b.

analog

c.

either (a) or (b)

d.

neither (a) nor (b)

Discuss
Answer: (a).digital
Q34.
Baseband transmission of a digital signal is possible only if we have a ____ channel.

a.

low-pass

b.

bandpass

c.

low rate

d.

high rate

Discuss
Answer: (a).low-pass
Q35.
If the available channel is a ____ channel, we cannot send a digital signal directly to the channel.

a.

low-pass

b.

bandpass

c.

low rate

d.

high rate

Discuss
Answer: (b).bandpass
Q36.
For a ______ channel, the Nyquist bit rate formula defines the theoretical maximum bit rate.

a.

noisy

b.

noiseless

c.

bandpass

d.

low-pass

Discuss
Answer: (b).noiseless
Q37.
For a ______ channel, we need to use the Shannon capacity to find the maximum bit rate.

a.

noisy

b.

noiseless

c.

bandpass

d.

low-pass

Discuss
Answer: (a).noisy
Q38.
_________ can impair a signal.

a.

Attenuation

b.

Distortion

c.

Noise

d.

All of the above

Discuss
Answer: (d).All of the above
Q39.
The _________ product defines the number of bits that can fill the link.

a.

bandwidth-period

b.

frequency-amplitude

c.

bandwidth-delay

d.

delay-amplitude

Discuss
Answer: (c).bandwidth-delay
Q40.
The portion of physical layer that interfaces with the media access control sublayer is called

a.

physical signalling sublayer

b.

physical data sublayer

c.

physical address sublayer

d.

none of the mentioned

Discuss
Answer: (a).physical signalling sublayer
Page 4 of 24

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