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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 9 of 24

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Q81.
In ______ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

a.

polar

b.

bipolar

c.

unipolar

d.

all of the above

Discuss
Answer: (a).polar
Q82.
In _____, the level of the voltage determines the value of the bit.

a.

NRZ-I

b.

NRZ-L

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).NRZ-L
Q83.
In ______, the change or lack of change in the level of the voltage determines the value of the bit.

a.

NRZ-I

b.

NRZ-L

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (a).NRZ-I
Q84.
The idea of RZ and the idea of NRZ-L are combined into the ________ scheme.

a.

Manchester

b.

differential Manchester

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (a).Manchester
Q85.
The idea of RZ and the idea of NRZ-I are combined into the ________ scheme.

a.

Manchester

b.

differential Manchester

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).differential Manchester
Q86.
In _______ encoding, the duration of the bit is divided into two halves. The voltage remains at one level during the first half and moves to the other level in the second half. The transition at the middle of the bit provides synchronization.

a.

Manchester

b.

differential Manchester

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) and (b)
Q87.
In ___________ there is always a transition at the middle of the bit, but the bit values are determined at the beginning of the bit. If the next bit is 0, there is a transition; if the next bit is 1, there is none.

a.

Manchester

b.

differential Manchester

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).differential Manchester
Q88.
In Manchester and differential Manchester encoding, the transition at the middle of the bit is used for __________.

a.

bit transfer

b.

baud transfer

c.

synchronization

d.

none of the above

Discuss
Answer: (c).synchronization
Q89.
The minimum bandwidth of Manchester and differential Manchester is ____ that of NRZ.

a.

the same as

b.

twice

c.

thrice

d.

none of the above

Discuss
Answer: (b).twice
Q90.
In _______encoding, we use three levels: positive, zero, and negative.

a.

unipolar

b.

bipolar

c.

polar

d.

none of the above

Discuss
Answer: (b).bipolar
Page 9 of 24

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