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FIELD TECH 2-3 FINAL (NCTI) ACTUAL EXAM
|EXPERT VERIFIED QUESTIONS & ANSWERS
In which of the following applications might a wireless local area network (WLAN)
be deployed in a distribution layer role - Correct-answer-When the network
requires speed, flexibility, and reliability
What specific problem does a wireless local area network (WLAN) resolve for
corporations and home users - Correct-answer-Excessive data cabling
What challenges do Wireless Internet Service Providers (WISP) have to overcome
in order to provide "last mile data delivery" to customers - Correct-answer-
Distance to access points (AP), rooftop access, lightning, trees, mountains, tower
access, and other physical obstacles to connectivity
In what manner do radio waves propagate (move) away from the source
(antenna) - Correct-answer-In a straight line in all directions at once
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Which one of the following radio frequency (RF) behaviors is defined as "the
bending of a wave as it passes through a medium of different density" - Correct-
answer-Refraction
Which of the voltage standing wave ratios (VSWR) shown below is best for
transferring radio frequency (RF) energy between connections? - Correct-
answer-1.2:1
What are some measures that can be taken to prevent high voltage standing
wave ratios (VSWR) in transmitters and receivers - Correct-answer-Tighten
connections between cables and connectors and use impedance-matched
hardware throughput
How does radio frequency line-of-sight (RF LOS) differ from visual LOS - Correct-
answer-LOS is accompanied by a Fresnel Zone, a series of concentric ellipsoid-
shaped areas around the visual LOS path
Why is the Fresnel Zone important to the integrity of the RF link or path - Correct-
answer-The Fresnel Zone defines an area around the RF line-of-sight (RF LOS) that
can introduce RF signal interference if blocked
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What is Equivalent Isotopically Radiated Power (EIRP) - Correct-answer-The
power actually radiated by the antenna element
What unit of measurement is used to express the gain of an antenna - Correct-
answer-Decibels over, or under 1 milliwatt (mW)
Given an access point (AP) with 100 milliwatts (mW) of output power connected
through a cable with 3 dB of loss to the antenna with a 10 decibels isotropic dBi
gain, what is the approximate Equivalent Isotropically Radiated Power (EIRP) level
from the antenna in Milliwatts - Correct-answer-500 mW
An antenna cable connects the transmitter to an amplifier, and the power into
the amplifier's input measures 50 mW. The amplifier increases the signal to the
original transmitter's power level and sends the signal to the antenna. The
antenna recieves the signal from the amplifer at 75 mW, and then transmits at
150 mW. What is the intentional IR power level in this radio frequency (RF) circuit
- Correct-answer-75 mWWhen
Which of the following networks or products use spread spectrum tech - Correct-
answer-Wireless local area networks, Bluetooth, and global positioning systems
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Why is spread spectrum tech used in applications such as Bluetooth wireless
personal area networks (WPAN) - Correct-answer-Spread Spectrum tech allows
wireless networking to create a short range, personal communications network
In a frequency-hopping spread spectrum (FHSS) system that uses 10 frequencies
across a 12 MHz frequency band, what happens if narrowband interference
occurs at only one of the 10 frequencies - Correct-answer-The spread spectrum
signal remains intact. Instead of being lost, the data on the interfered frequency is
retransmitted on one of the other nine frequencies
The Federal Communications Commission (FCC) rules regarding power output for
frequency-hopping spread spectrum (FHSS) state that a maximum output to the
intentional radiator (IR) with 5 MHz of carrier frequency bandwidth must be
which one of the following - Correct-answer-125 mW
The ratio of the chipping code to data bits for a direct sequence spread spectrum
(DSSS) signal is called which of the following - Correct-answer-Processing Gain
FIELD TECH 2-3 FINAL (NCTI) ACTUAL EXAM
|EXPERT VERIFIED QUESTIONS & ANSWERS
In which of the following applications might a wireless local area network (WLAN)
be deployed in a distribution layer role - Correct-answer-When the network
requires speed, flexibility, and reliability
What specific problem does a wireless local area network (WLAN) resolve for
corporations and home users - Correct-answer-Excessive data cabling
What challenges do Wireless Internet Service Providers (WISP) have to overcome
in order to provide "last mile data delivery" to customers - Correct-answer-
Distance to access points (AP), rooftop access, lightning, trees, mountains, tower
access, and other physical obstacles to connectivity
In what manner do radio waves propagate (move) away from the source
(antenna) - Correct-answer-In a straight line in all directions at once
,2|Page
Which one of the following radio frequency (RF) behaviors is defined as "the
bending of a wave as it passes through a medium of different density" - Correct-
answer-Refraction
Which of the voltage standing wave ratios (VSWR) shown below is best for
transferring radio frequency (RF) energy between connections? - Correct-
answer-1.2:1
What are some measures that can be taken to prevent high voltage standing
wave ratios (VSWR) in transmitters and receivers - Correct-answer-Tighten
connections between cables and connectors and use impedance-matched
hardware throughput
How does radio frequency line-of-sight (RF LOS) differ from visual LOS - Correct-
answer-LOS is accompanied by a Fresnel Zone, a series of concentric ellipsoid-
shaped areas around the visual LOS path
Why is the Fresnel Zone important to the integrity of the RF link or path - Correct-
answer-The Fresnel Zone defines an area around the RF line-of-sight (RF LOS) that
can introduce RF signal interference if blocked
,3|Page
What is Equivalent Isotopically Radiated Power (EIRP) - Correct-answer-The
power actually radiated by the antenna element
What unit of measurement is used to express the gain of an antenna - Correct-
answer-Decibels over, or under 1 milliwatt (mW)
Given an access point (AP) with 100 milliwatts (mW) of output power connected
through a cable with 3 dB of loss to the antenna with a 10 decibels isotropic dBi
gain, what is the approximate Equivalent Isotropically Radiated Power (EIRP) level
from the antenna in Milliwatts - Correct-answer-500 mW
An antenna cable connects the transmitter to an amplifier, and the power into
the amplifier's input measures 50 mW. The amplifier increases the signal to the
original transmitter's power level and sends the signal to the antenna. The
antenna recieves the signal from the amplifer at 75 mW, and then transmits at
150 mW. What is the intentional IR power level in this radio frequency (RF) circuit
- Correct-answer-75 mWWhen
Which of the following networks or products use spread spectrum tech - Correct-
answer-Wireless local area networks, Bluetooth, and global positioning systems
, 4|Page
Why is spread spectrum tech used in applications such as Bluetooth wireless
personal area networks (WPAN) - Correct-answer-Spread Spectrum tech allows
wireless networking to create a short range, personal communications network
In a frequency-hopping spread spectrum (FHSS) system that uses 10 frequencies
across a 12 MHz frequency band, what happens if narrowband interference
occurs at only one of the 10 frequencies - Correct-answer-The spread spectrum
signal remains intact. Instead of being lost, the data on the interfered frequency is
retransmitted on one of the other nine frequencies
The Federal Communications Commission (FCC) rules regarding power output for
frequency-hopping spread spectrum (FHSS) state that a maximum output to the
intentional radiator (IR) with 5 MHz of carrier frequency bandwidth must be
which one of the following - Correct-answer-125 mW
The ratio of the chipping code to data bits for a direct sequence spread spectrum
(DSSS) signal is called which of the following - Correct-answer-Processing Gain
