Question 1

The height of a sound wave is called its:

Accepted Answer

A) frequency 
B) phase 
C) amplitude 
D) bandwidth 
E) furlong 
A) frequency 
B) phase 
C) amplitude 
D) bandwidth 
E) furlong

Question 2

Frequency is the number of cycles per second and is expressed in Hertz.

Accepted Answer

A) True 
 B)False

Question 3

In full-duplex transmission, two stations can send and receive simultaneously.

Accepted Answer

A) True 
 B)False

Question 4

_____________ can be thought of as dividing the circuit horizontally.

Accepted Answer

A) Frequency division multiplexing 
B) Statistical frequency division multiplexing 
C) Statistical time division multiplexing 
D) Time division multiplexing 
E) Wavelength division multiplexing 
A) Frequency division multiplexing 
B) Statistical frequency division multiplexing 
C) Statistical time division multiplexing 
D) Time division multiplexing 
E) Wavelength division multiplexing

Question 5

_____________ is not a form of modulation used to transform digital data into analog signals.

Accepted Answer

A) synchronous time division 
B) amplitude shift keying 
C) amplitude modulation 
D) frequency modulation 
E) phase modulation 
A) synchronous time division 
B) amplitude shift keying 
C) amplitude modulation 
D) frequency modulation 
E) phase modulation

Question 6

Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

Accepted Answer

A) True 
 B)False

Question 7

The ability to transmit in both directions, but only in one direction at a time is an example of _______________ transmission.

Accepted Answer

A) simplex 
B) full-duplex 
C) half-duplex 
D) analog 
E) digital 
A) simplex 
B) full-duplex 
C) half-duplex 
D) analog 
E) digital

Question 8

Describe how data could be transmitted using phase modulation.

Accepted Answer

Phase modulation is a method of transmit

Question 9

How does bipolar signaling differ from unipolar signaling? Why is Manchester encoding more popular than either? What kind of signaling is used in Ethernet?

Accepted Answer

Bipolar signaling differs from unipolar

Question 10

Transmission speeds:

Accepted Answer

A) are the same among all media 
B) are not a factor in selecting a media because all media have more than enough speed to serve current communication demands 
C) are a constant, 56Kbps, for all media types 
D) differ widely among media 
E) always have a direct correlation with security 
A) are the same among all media 
B) are not a factor in selecting a media because all media have more than enough speed to serve current communication demands 
C) are a constant, 56Kbps, for all media types 
D) differ widely among media 
E) always have a direct correlation with security

Question 11

Which type of digital signaling would experience fewer errors because it has more distinct signals?

Accepted Answer

A) unipolar 
B) serial 
C) bipolar 
D) attenuation 
E) Huffman encoding signal 
A) unipolar 
B) serial 
C) bipolar 
D) attenuation 
E) Huffman encoding signal

Question 12

___________ is not a type of digital signaling technique.

Accepted Answer

A) Non-return-to-zero signaling 
B) Unipolar signaling 
C) Manchester encoding 
D) Return-to-zero signaling 
E) Data rate signaling 
A) Non-return-to-zero signaling 
B) Unipolar signaling 
C) Manchester encoding 
D) Return-to-zero signaling 
E) Data rate signaling

Question 13

What are the three important characteristics of a sound wave?

Accepted Answer

The three important characteristics of a

Question 14

Computers produce digital data whose values are binary: 0 or 1.

Accepted Answer

A) True 
 B)False

Question 15

____________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per symbol.

Accepted Answer

A) quadrature amplitude modulation 
B) time division multiplexing 
C) synchronous digital line control 
D) pulse code modulation 
E) baseband signaling 
A) quadrature amplitude modulation 
B) time division multiplexing 
C) synchronous digital line control 
D) pulse code modulation 
E) baseband signaling

Question 16

A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters.

Accepted Answer

A) 256 
B) 20 
C) 200 
D) 512 
E) 1024 
A) 256 
B) 20 
C) 200 
D) 512 
E) 1024

Question 17

Compare and contrast Frequency Division Multiplexing FDM) and Wavelength Division Multiplexing WDM).

Accepted Answer

Frequency Division Multiplexing (FDM) an

Question 18

_________ is the basic physical layout of the circuit.

Accepted Answer

A) point-to-point configuration 
B) configuration 
C) circuit configuration 
D) circuit design 
E) circuit plan 
A) point-to-point configuration 
B) configuration 
C) circuit configuration 
D) circuit design 
E) circuit plan

Question 19

With which type of digital signaling does the signal always return to zero volts after each bit?

Accepted Answer

A) Non-return-to-zero signaling 
B) Unipolar signaling 
C) Return-to-zero signaling 
D) Data rate signaling 
E) Huffman encoding signal 
A) Non-return-to-zero signaling 
B) Unipolar signaling 
C) Return-to-zero signaling 
D) Data rate signaling 
E) Huffman encoding signal

Question 20

Under what circumstances would you use a microwave circuit rather than a satellite circuit?

Accepted Answer

Microwave circuits and satellite circuit

The height of a sound wave is called its:

Frequency is the number of cycles per second and is expressed in Hertz.

In full-duplex transmission, two stations can send and receive simultaneously.

_____________ can be thought of as dividing the circuit horizontally.

_____________ is not a form of modulation used to transform digital data into analog signals.

Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

The ability to transmit in both directions, but only in one direction at a time is an example of _______________ transmission.

Describe how data could be transmitted using phase modulation.

How does bipolar signaling differ from unipolar signaling? Why is Manchester encoding more popular than either? What kind of signaling is used in Ethernet?

Transmission speeds:

Which type of digital signaling would experience fewer errors because it has more distinct signals?

___________ is not a type of digital signaling technique.

What are the three important characteristics of a sound wave?

Computers produce digital data whose values are binary: 0 or 1.

____________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per symbol.

A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters.

Compare and contrast Frequency Division Multiplexing FDM) and Wavelength Division Multiplexing WDM).

_________ is the basic physical layout of the circuit.

With which type of digital signaling does the signal always return to zero volts after each bit?

Under what circumstances would you use a microwave circuit rather than a satellite circuit?

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

The height of a sound wave is called its:

Frequency is the number of cycles per second and is expressed in Hertz.

In full-duplex transmission, two stations can send and receive simultaneously.

_____________ can be thought of as dividing the circuit horizontally.

_____________ is not a form of modulation used to transform digital data into analog signals.

Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

The ability to transmit in both directions, but only in one direction at a time is an example of _______________ transmission.

Describe how data could be transmitted using phase modulation.

How does bipolar signaling differ from unipolar signaling? Why is Manchester encoding more popular than either? What kind of signaling is used in Ethernet?

Transmission speeds:

Which type of digital signaling would experience fewer errors because it has more distinct signals?

___________ is not a type of digital signaling technique.

What are the three important characteristics of a sound wave?

Computers produce digital data whose values are binary: 0 or 1.

____________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per symbol.

A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters.

Compare and contrast Frequency Division Multiplexing FDM) and Wavelength Division Multiplexing WDM).

_________ is the basic physical layout of the circuit.

With which type of digital signaling does the signal always return to zero volts after each bit?

Under what circumstances would you use a microwave circuit rather than a satellite circuit?

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