PROGRESSION: FIELD TECH II-III CONVENTIONAL NCTI 2026-2027 ACTUAL EXAM 250 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) | ALREADY GRADED A+

PROGRESSION: FIELD TECH II-III CONVENTIONAL NCTI

2026-2027 ACTUAL EXAM 250 QUESTIONS AND CORRECT

DETAILED ANSWERS WITH RATIONALES (VERIFIED

ANSWERS) | ALREADY GRADED A+

When configuring a wireless router, why is changing the service set

identifier (SSID) from the device default recommended? - ANSWERTo avoid telling hackers exactly what the device is.

Which mode uses a wireless access point (WAP) connected to a wired

network? - ANSWER- Infrastructure.

In regard to Wi-Fi networks, what is WPS used for? - ANSWER- To

enable connection to a Wi-Fi network without a Windows interface.

Which encryption method is the most secure for a wireless network? -

ANSWER- WPA2.

How many channels are available with IEEE 802.11g? - ANSWER- 11

What is the last step of the basic wireless access point (WAP) setup? -

ANSWER- Apply security.

All 802.11 standards use one of two frequency bands. What are these

frequency bands? - ANSWER- 2.4 GHz and 5 GHz bands.

What uses the 2.4-GHz band and runs at 54 Mbps? - ANSWER802.11g

Which organization regulates the use of wireless local area network

(WLAN) devices in the United States? - ANSWER- The Federal

Communications Commission (FCC).

Which of the following IEEE 802.11 wireless local area network

(WLAN) standards specifies both spread spectrum RF and infrared (IR)

transmission technologies? - ANSWER- 802.11

Why has it become cost-effective for enterprise companies to integrate

wireless local area network (WLAN) segments into their networks? -

ANSWER- The cost of wireless technology has decreased and the

quality has increased.

Which one of the following wireless standards utilizes the 5 gigahertz

(GHz) frequency band for its signal transmissions? - ANSWER802.11n

Why are wireless local area networks (WLAN) usually deployed in an

access capacity instead of as the network's core layer? - ANSWERWLANs 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? - ANSWER- The Data

Link Layer.

What type of connectivity is needed to connect networks between two

buildings located across the street from each other? - ANSWER- Pointto-point (P2P).

In which of the following applications might a wireless local area

network (WLAN) be deployed in a distribution layer role? - ANSWERAs a building-to-building bridge used to link corporate network

segments.

What specific problem does a wireless local area network (WLAN)

resolve for corporations and home users? - 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? -

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)? - 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"? - ANSWER- Refraction.

Which of the voltage standing wave ratios (VSWR) shown below is best

for transferring radio frequency (RF) energy between connections? -

ANSWER- 1.2:1

What are some measures that can be taken to prevent high voltage

standing wave ratios (VSWR) in transmitters and receivers? -

ANSWER- Tighten connections between cables and connectors and use

impedance-matched hardware throughout.

How does radio frequency line-of-sight (RF LOS) differ from visual

LOS? - ANSWER- RF 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 radio frequency

(RF) link or path? - 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 Isotropically Radiated Power (EIRP)? - ANSWERThe power actually radiated by the antenna element.

What unit of measurement is used to express the gain of an antenna? -

ANSWER- Decibels isotropic (dBi).