Question 1

Fiber optic cable can only be used on LANs.

Accepted Answer

A) True 
 B)False

Question 2

What is the typical sampling network in telephony? Why is a higher sampling rate more effective for sound quality?

Accepted Answer

The typical sampling network in telephon

Question 3

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

Accepted Answer

A) pulse code modulation 
B) adaptive differential pulse code modulation 
C) Voice conversation 
D) code modulation 
E) phase modulation 
A) pulse code modulation 
B) adaptive differential pulse code modulation 
C) Voice conversation 
D) code modulation 
E) phase modulation

Question 4

The amount of time it takes to switch between sending and receiving in half-duplex transmission is called the propagation delay.

Accepted Answer

A) True 
 B)False

Question 5

The direction in which the sound wave begins is known as:

Accepted Answer

A) amplitude, which our ears detect as loudness 
B) frequency, which our ears detect as pitch 
C) phase 
D) bandwidth 
E) furlong 
A) amplitude, which our ears detect as loudness 
B) frequency, which our ears detect as pitch 
C) phase 
D) bandwidth 
E) furlong

Question 6

Multiplexing increases the cost of provisioning network circuits.

Accepted Answer

A) True 
 B)False

Question 7

Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.

Accepted Answer

A) True 
 B)False

Question 8

The typical range of human hearing is:

Accepted Answer

A) 0 to 4,000 Hz 
B) 0 to 1,200 Hz 
C) 20 to 14,000 Hz 
D) 0 to 300 Hz 
E) 0 to 56,000 Hz 
A) 0 to 4,000 Hz 
B) 0 to 1,200 Hz 
C) 20 to 14,000 Hz 
D) 0 to 300 Hz 
E) 0 to 56,000 Hz

Question 9

What is the term used to describe the placing of two or more signals on a single circuit?

Accepted Answer

The term used to describe the placing of

Question 10

Which of the following is the most secure wired media?

Accepted Answer

A) coaxial cable 
B) unshielded twisted pair 
C) shielded twisted pair 
D) fiber optic cable 
E) infrared 
A) coaxial cable 
B) unshielded twisted pair 
C) shielded twisted pair 
D) fiber optic cable 
E) infrared

Question 11

Describe some of the physical security concerns described in this chapter.

Accepted Answer

Some of the physical security concerns d

Question 12

Describe three types of guided media.Give an example, describe what it looks like and how it works, and why it might be used in a scenario of a network.

Accepted Answer

1. Twisted Pair Cable:
Example: Ethernet

Question 13

Which of the following is not a key advantage of digital transmission?

Accepted Answer

A) It permits only low transmission rates. 
B) It is more efficient. 
C) It is simpler to integrate voice, video, and data on the same circuit. 
D) It is more secure. 
E) It produces fewer errors. 
A) It permits only low transmission rates. 
B) It is more efficient. 
C) It is simpler to integrate voice, video, and data on the same circuit. 
D) It is more secure. 
E) It produces fewer errors.

Question 14

The type of media usually installed on homes and businesses by the telephone company is called ____________.

Accepted Answer

A) fiber optic cable 
B) coaxial cable 
C) twisted pair 
D) phone cable 
E) phone wire 
A) fiber optic cable 
B) coaxial cable 
C) twisted pair 
D) phone cable 
E) phone wire

Question 15

The predominant method of transferring information internally in a computer is via parallel mode.

Accepted Answer

A) True 
 B)False

Question 16

Describe two common modem standards.

Accepted Answer

Two common modem standards that have bee

Question 17

Frequency division multiplexing:

Accepted Answer

A) operates by statistically time slicing the signal 
B) operates by dividing the signal into different frequencies 
C) uses a codec that divides signals into different channels 
D) operates by time slicing the signal 
E) operates by light dividing the signal 
A) operates by statistically time slicing the signal 
B) operates by dividing the signal into different frequencies 
C) uses a codec that divides signals into different channels 
D) operates by time slicing the signal 
E) operates by light dividing the signal

Question 18

The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels is a:

Accepted Answer

A) wavelength division multiplexer 
B) time division multiplexer 
C) statistical time division multiplexer 
D) frequency division multiplexer 
E) statistical frequency division multiplexer 
A) wavelength division multiplexer 
B) time division multiplexer 
C) statistical time division multiplexer 
D) frequency division multiplexer 
E) statistical frequency division multiplexer

Question 19

Ethernet, a common LAN technology, uses Manchester encoding.

Accepted Answer

A) True 
 B)False

Question 20

The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.

Accepted Answer

A) True 
 B)False

Fiber optic cable can only be used on LANs.

What is the typical sampling network in telephony? Why is a higher sampling rate more effective for sound quality?

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

The amount of time it takes to switch between sending and receiving in half-duplex transmission is called the propagation delay.

The direction in which the sound wave begins is known as:

Multiplexing increases the cost of provisioning network circuits.

Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.

The typical range of human hearing is:

What is the term used to describe the placing of two or more signals on a single circuit?

Which of the following is the most secure wired media?

Describe some of the physical security concerns described in this chapter.

Describe three types of guided media.Give an example, describe what it looks like and how it works, and why it might be used in a scenario of a network.

Which of the following is not a key advantage of digital transmission?

The type of media usually installed on homes and businesses by the telephone company is called ____________.

The predominant method of transferring information internally in a computer is via parallel mode.

Describe two common modem standards.

Frequency division multiplexing:

The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels is a:

Ethernet, a common LAN technology, uses Manchester encoding.

The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.

Introduction to Data Communications

Application Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 3: Physical Layer

Fiber optic cable can only be used on LANs.

What is the typical sampling network in telephony? Why is a higher sampling rate more effective for sound quality?

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

The amount of time it takes to switch between sending and receiving in half-duplex transmission is called the propagation delay.

The direction in which the sound wave begins is known as:

Multiplexing increases the cost of provisioning network circuits.

Statistical time division multiplexing does not require the capacity of the circuit to be equal to the sum of the combined circuits.

The typical range of human hearing is:

What is the term used to describe the placing of two or more signals on a single circuit?

Which of the following is the most secure wired media?

Describe some of the physical security concerns described in this chapter.

Describe three types of guided media.Give an example, describe what it looks like and how it works, and why it might be used in a scenario of a network.

Which of the following is not a key advantage of digital transmission?

The type of media usually installed on homes and businesses by the telephone company is called ____________.

The predominant method of transferring information internally in a computer is via parallel mode.

Describe two common modem standards.

Frequency division multiplexing:

The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels is a:

Ethernet, a common LAN technology, uses Manchester encoding.

The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.

Introduction to Data Communications

Application Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters