Question 1

The advantages of digital signaling are that it is generally cheaper than analog signaling and is less susceptible to noise interference.

Accepted Answer

A) True 
 B)False

Question 2

A reduction in strength is ________.

Accepted Answer

A) delay distortion 
B) attenuation 
C) pulsing 
D) interlacing

Question 3

The communication of data by the propagation and processing of signals is ________.

Accepted Answer

A) interlacing 
B) transmission 
C) signaling 
D) effective bandwidth

Question 4

Analog signals suffer more from attenuation than do digital signals.

Accepted Answer

A) True 
 B)False

Question 5

Guided media,also called wireless,provide a physical means for guiding electromagnetic waves through seawater.

Accepted Answer

A) True 
 B)False

Question 6

Thermal noise is also referred to as ________ noise.

Accepted Answer

The answer of Thermal noise is also referred to as...

Question 7

There is not a direct relationship between data rate and bandwidth.

Accepted Answer

A) True 
 B)False

Question 8

Twisted pair,coaxial cable and optical fiber are examples of ________ media.

Accepted Answer

The answer of Twisted pair,coaxial cable and optical fiber are...

Question 9

________ noise is noncontinuous,consisting of irregular pulses or noise spikes of short duration and of relatively high amplitude.It is generated from a variety of causes such as lightning and faults and flaws in the communications system.

Accepted Answer

The answer of ________ noise is noncontinuous,consisting of irregular pulses...

Question 10

The ________ of a signal is the distance occupied by a single cycle.

Accepted Answer

A) bandwidth 
B) frequency 
C) wavelength 
D) amplitude

Question 11

The sine wave is the fundamental aperiodic signal.

Accepted Answer

A) True 
 B)False

Question 12

When signals at different frequencies share the same transmission medium the result may be ________ noise.

Accepted Answer

A) crosstalk 
B) white 
C) intermodulation 
D) impulse

Question 13

An example of digital data is ________ or character strings.

Accepted Answer

A) interlaced 
B) text 
C) audio 
D) video

Question 14

A major problem in designing a communications facility is transmission impairment.

Accepted Answer

A) True 
 B)False

Question 15

A familiar example of analog data is audio,which,in the form of acoustic sound waves,can be perceived directly by human beings.

Accepted Answer

A) True 
 B)False

Question 16

The greater the bandwidth of the signal the greater its information carrying capacity.

Accepted Answer

A) True 
 B)False

Question 17

The term ________ is used to refer to the transmission path between two devices in which signals propagate directly from transmitter to receiver with no intermediate devices other than amplifiers or repeaters used to increase signal strength.

Accepted Answer

A) direct link 
B) unguided media 
C) wireless 
D) guided

Question 18

Only digital signals can be used to convey information in the communications environment.

Accepted Answer

A) True 
 B)False

Question 19

The ________ of a signal is the range of frequencies that it contains.

Accepted Answer

A) spectrum 
B) effective bandwidth 
C) bandwidth 
D) wavelength

Question 20

________ noise is due to thermal agitation of electrons.It is present in all electronic devices and transmission media and is a function of temperature.

Accepted Answer

The answer of ________ noise is due to thermal agitation...

Exam 3: Data Transmission

The advantages of digital signaling are that it is generally cheaper than analog signaling and is less susceptible to noise interference.

A reduction in strength is ________.

The communication of data by the propagation and processing of signals is ________.

Analog signals suffer more from attenuation than do digital signals.

Guided media,also called wireless,provide a physical means for guiding electromagnetic waves through seawater.

Thermal noise is also referred to as ________ noise.

There is not a direct relationship between data rate and bandwidth.

Twisted pair,coaxial cable and optical fiber are examples of ________ media.

________ noise is noncontinuous,consisting of irregular pulses or noise spikes of short duration and of relatively high amplitude.It is generated from a variety of causes such as lightning and faults and flaws in the communications system.

The ________ of a signal is the distance occupied by a single cycle.

The sine wave is the fundamental aperiodic signal.

When signals at different frequencies share the same transmission medium the result may be ________ noise.

An example of digital data is ________ or character strings.

A major problem in designing a communications facility is transmission impairment.

A familiar example of analog data is audio,which,in the form of acoustic sound waves,can be perceived directly by human beings.

The greater the bandwidth of the signal the greater its information carrying capacity.

The term ________ is used to refer to the transmission path between two devices in which signals propagate directly from transmitter to receiver with no intermediate devices other than amplifiers or repeaters used to increase signal strength.

Only digital signals can be used to convey information in the communications environment.

The ________ of a signal is the range of frequencies that it contains.

________ noise is due to thermal agitation of electrons.It is present in all electronic devices and transmission media and is a function of temperature.