TELECOMMUNICATION AND WIRELESS
COMMUNICATION WGU D413 PRACTICE EXAM
QUESTIONS AND ANSWERS
What is bandwidth?
>The maximum theoretical capacity of a network communication link
>The instantaneous data-sending rate of network data transmission
>The difference between the highest and lowest frequency of data
signals
>The length of time for a signal wave to complete one complete cycle
>The maximum theoretical capacity of a network communication link
Which factor contributes to signal attenuation?
Noise
Short travel distance
Bandwidth
Network congestion
Noise
Which term is defined as the number of cycles a signal completes in
one second?
Frequency
Transmission rate
Peak amplitude
Bandwidth
Frequency
,How is phase defined?
A wave position relative to a reference position
The total data capacity of network transmission
A stage of the pattern of sending and receiving signals
The amount of time a signal needs to finish one cycle
A wave position relative to a reference position
What is the absolute value of a signal's greatest magnitude in
proportion to the energy that it is able to carry?
Peak amplitude
Period
Spread
Delta
Peak amplitude
What is one advantage of twisted-pair cables over fiber-optic cables?
They require less skill and experience to install.
They transmit signals over longer distances.
They are less susceptible to electromagnetic interference.
They have higher data transmission rates.
They require less skill and experience to install.
What is one characteristic of coaxial cables?
They use a dielectric insulator to reduce electromagnetic field
interference.
They can transmit signals to a maximum of 100 MHz.
They transmit only analog signals.
They make use of light in signal transmission from one point to
another.
,They use a dielectric insulator to reduce electromagnetic field
interference.
What is a characteristic of fiber-optic cables?
They are composed of a core, cladding, a buffer, and a jacket.
They have large diameters and tend to be heavy.
They have four nodes in most cases.
They only carry data over distances of 2-100 meters.
They are composed of a core, cladding, a buffer, and a jacket.
What is one advantage of fiber-optic cables?
Fiber-optic cables can be used in safety-critical places.
Fiber-optic cables can be installed cheaply and quickly.
Fiber-optic cables can be tensioned without resulting in damage.
Fiber-optic cables can be used over mobile communication links.
Fiber-optic cables can be used in safety-critical places.
What is one drawback of fiber-optic cable?
It contains fragile components.
It has high attenuation.
It cannot be used in dangerous places.
It performs poorly over long distances.
It contains fragile components.
What is one type of waveform used to transmit electromagnetic
signals in wireless media?
Radio waves
Ultraviolet waves
Thermal waves
Gamma waves
, Radio waves
What is the wireless service that enables people to have access to
mobile internet?
Cellular digital packet data (CDPD)
Bluetooth
Ethernet
Wireless Application Protocol (WAP)
Cellular digital packet data (CDPD)
Which waves have higher frequencies than infrared transmission
frequencies?
Visible light waves
Microwaves
Radio waves
Electromagnetic waves
Visible light waves
Which type of waves are used in Bluetooth transmission?
Low-power radio waves
High-power radio waves
Low-power ultraviolet waves
High-power ultraviolet waves
Low-power radio waves
What is a source of industrial noise?
Electric motors
Lightning
Crosstalk
Electron movement
Electric motors
Which cable realizes noise protection with the use of foil shielding?
COMMUNICATION WGU D413 PRACTICE EXAM
QUESTIONS AND ANSWERS
What is bandwidth?
>The maximum theoretical capacity of a network communication link
>The instantaneous data-sending rate of network data transmission
>The difference between the highest and lowest frequency of data
signals
>The length of time for a signal wave to complete one complete cycle
>The maximum theoretical capacity of a network communication link
Which factor contributes to signal attenuation?
Noise
Short travel distance
Bandwidth
Network congestion
Noise
Which term is defined as the number of cycles a signal completes in
one second?
Frequency
Transmission rate
Peak amplitude
Bandwidth
Frequency
,How is phase defined?
A wave position relative to a reference position
The total data capacity of network transmission
A stage of the pattern of sending and receiving signals
The amount of time a signal needs to finish one cycle
A wave position relative to a reference position
What is the absolute value of a signal's greatest magnitude in
proportion to the energy that it is able to carry?
Peak amplitude
Period
Spread
Delta
Peak amplitude
What is one advantage of twisted-pair cables over fiber-optic cables?
They require less skill and experience to install.
They transmit signals over longer distances.
They are less susceptible to electromagnetic interference.
They have higher data transmission rates.
They require less skill and experience to install.
What is one characteristic of coaxial cables?
They use a dielectric insulator to reduce electromagnetic field
interference.
They can transmit signals to a maximum of 100 MHz.
They transmit only analog signals.
They make use of light in signal transmission from one point to
another.
,They use a dielectric insulator to reduce electromagnetic field
interference.
What is a characteristic of fiber-optic cables?
They are composed of a core, cladding, a buffer, and a jacket.
They have large diameters and tend to be heavy.
They have four nodes in most cases.
They only carry data over distances of 2-100 meters.
They are composed of a core, cladding, a buffer, and a jacket.
What is one advantage of fiber-optic cables?
Fiber-optic cables can be used in safety-critical places.
Fiber-optic cables can be installed cheaply and quickly.
Fiber-optic cables can be tensioned without resulting in damage.
Fiber-optic cables can be used over mobile communication links.
Fiber-optic cables can be used in safety-critical places.
What is one drawback of fiber-optic cable?
It contains fragile components.
It has high attenuation.
It cannot be used in dangerous places.
It performs poorly over long distances.
It contains fragile components.
What is one type of waveform used to transmit electromagnetic
signals in wireless media?
Radio waves
Ultraviolet waves
Thermal waves
Gamma waves
, Radio waves
What is the wireless service that enables people to have access to
mobile internet?
Cellular digital packet data (CDPD)
Bluetooth
Ethernet
Wireless Application Protocol (WAP)
Cellular digital packet data (CDPD)
Which waves have higher frequencies than infrared transmission
frequencies?
Visible light waves
Microwaves
Radio waves
Electromagnetic waves
Visible light waves
Which type of waves are used in Bluetooth transmission?
Low-power radio waves
High-power radio waves
Low-power ultraviolet waves
High-power ultraviolet waves
Low-power radio waves
What is a source of industrial noise?
Electric motors
Lightning
Crosstalk
Electron movement
Electric motors
Which cable realizes noise protection with the use of foil shielding?
