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.

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 7 of 24

Explore more Topics under Networking

01

Network Models

02

Networking Basics

03

Multiplexing

04

Transmission Media

05

Data Link Layer

06

Ethernet

07

Wireless LANs

08

Switching

09

Network Layer

10

Routing

11

Network Layer Protocols

12

Transport Layer

13

Congestion Control

14

Application Layer

15

Client Server Model

16

DNS

17

Application Layer Protocols

18

LAN Topologies

19

LAN Standards

20

Medium Access Methods

21

Frame Relay and ATM

22

Network Security

23

Synchronous Optical Networking

24

Wireless WANs Cellular Telephone and Satellite Networks

25

Storage Area Networks

Q61.

___________ conversion involves three techniques: line coding, block coding, and scrambling.

a.

Analog-to-digital

b.

Digital-to-analog

c.

Analog-to-analog

d.

Digital-to-digital

Discuss

Answer: (d).Digital-to-digital

Q62.

________ is the process of converting digital data to a digital signal.

a.

Block coding

b.

Line coding

c.

Scrambling

d.

None of the above

Discuss

Answer: (b).Line coding

Q63.

_______ provides redundancy to ensure synchronization and inherent error detection.

a.

Block coding

b.

Line coding

c.

Scrambling

d.

None of the above

Discuss

Answer: (a).Block coding

Q64.

________ is normally referred to as mB/nB coding; it replaces each m-bit group with an n-bit group.

a.

Block coding

b.

Line coding

c.

Scrambling

d.

None of the above

Discuss

Answer: (a).Block coding

Q65.

________ provides synchronization without increasing the number of bits.

a.

Scrambling encoding

b.

Line coding

c.

Block coding

d.

None of the above

Discuss

Answer: (b).Scrambling

Q66.

Two common scrambling techniques are ________.

a.

NRZ and RZ

b.

AMI and NRZ

c.

B8ZS and HDB3

d.

Manchester and differential Manchester

Discuss

Answer: (c).B8ZS and HDB3

Q67.

The most common technique to change an analog signal to digital data is called __________.

a.

PAL

b.

PCM

c.

sampling

d.

none of the above

Discuss

Answer: (b).PCM

Q68.

The first step in PCM is ________.

a.

quantization

b.

modulation

c.

sampling

d.

none of the above

Discuss

Answer: (c).sampling

Q69.

There are three sampling methods: __________.

a.

quantized, sampled, and ideal

b.

ideal, sampled, and flat-top

c.

ideal, natural, and flat-top

d.

none of the above

Discuss

Answer: (c).ideal, natural, and flat-top

Q70.

______ finds the value of the signal amplitude for each sample; ____ finds the change from the previous sample.

a.

DM; PCM

b.

PCM; DM

c.

DM; CM

d.

none of the above

Discuss

Answer: (b).PCM; DM

Page 7 of 24

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