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FIELD TECH 2-3 FINAL (NCTI) ACTUAL EXAM
QUESTIONS WITH VERIFIED ANSWERS FOR
GUARANTEED SUCCESS
All 802.11 standards use one of two frequency bands. What are these frequency
bands - correct-answer-2.4 GHz and 5 GHz bands
What uses the 2.4 GHz band and runs at 54 Mbps - correct-answer-802.11g
Which organization regulates the use of wireless local area network (WLAN)
devices in the United States - correct-answer-The Federal Communications
Commision (FCC)
Which of the following IEEE 802.11 wireless local area network (WLAN) standards
specifies both spread spectrum RF and Infrared (IR) transmission tech - correct-
answer-802.11
Why has it become cost-effective for enterprise companies to integrate wireless
local area network (WLAN) segments into their networks - correct-answer-The
cost of wireless tech has decreased and the quality has increased
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Which one of the following wireless standards utilizes the 5 GHz frequency band
for its signal transmissions - correct-answer-802.11n
Why are wireless local area networks (WLAN) usually deployed in an access
capacity instead of as the network's core layer - correct-answer-WLANS are
generally incapable of meeting the requirements of the network core layer, which
needs to be very fast and stable, able to handle a tremendous amount of traffic
with little difficulty and must experience no down time
In which Open Systems Interconnection (OSI) reference model layer do wireless
local area networks (LAN) operate - correct-answer-The Data Link Layer
What type of connectivity is needed to connect networks between two buildings
located across the street from each other - correct-answer-Point-to-point (P2P)
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
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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
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
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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
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
FIELD TECH 2-3 FINAL (NCTI) ACTUAL EXAM
QUESTIONS WITH VERIFIED ANSWERS FOR
GUARANTEED SUCCESS
All 802.11 standards use one of two frequency bands. What are these frequency
bands - correct-answer-2.4 GHz and 5 GHz bands
What uses the 2.4 GHz band and runs at 54 Mbps - correct-answer-802.11g
Which organization regulates the use of wireless local area network (WLAN)
devices in the United States - correct-answer-The Federal Communications
Commision (FCC)
Which of the following IEEE 802.11 wireless local area network (WLAN) standards
specifies both spread spectrum RF and Infrared (IR) transmission tech - correct-
answer-802.11
Why has it become cost-effective for enterprise companies to integrate wireless
local area network (WLAN) segments into their networks - correct-answer-The
cost of wireless tech has decreased and the quality has increased
,2|Page
Which one of the following wireless standards utilizes the 5 GHz frequency band
for its signal transmissions - correct-answer-802.11n
Why are wireless local area networks (WLAN) usually deployed in an access
capacity instead of as the network's core layer - correct-answer-WLANS are
generally incapable of meeting the requirements of the network core layer, which
needs to be very fast and stable, able to handle a tremendous amount of traffic
with little difficulty and must experience no down time
In which Open Systems Interconnection (OSI) reference model layer do wireless
local area networks (LAN) operate - correct-answer-The Data Link Layer
What type of connectivity is needed to connect networks between two buildings
located across the street from each other - correct-answer-Point-to-point (P2P)
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
,3|Page
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
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
, 4|Page
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
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
