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NCTI Final Exam: Progression Field Tech
2 - 3 Test Exam (New 2024/ 2025)
Questions and Verified Answers| 100%
Correct| Grade A
QUESTION
What should be regularly done after wireless bridges have been installed to ensure link performance? Answer: Check throughput.
QUESTION
You are designing a wireless network to which several functional workgroups are connected. You want to configure your enterprise wireless gateway to allow you to quickly assign identical network access rights to persons within the same workgroup. Which enterprise wireless gateway feature provides this capability? Answer: RBAC
QUESTION
What are some common methods used to configure and manage APAccess points? Answer: Telnet/ssh (secure shell), USB Universal serial bus , and a built-in web server for browser access.
QUESTION
Polarization is defined as which one of the following? Answer: The orientation of an electromagnetic wave's electric field in relationship to the Earth's surface or plane.
QUESTION
In what direction does an omnidirectional antenna radiate RF energy? Answer: Equally in all directions around its axis.
QUESTION
What is the typical coverage pattern of a semidirectional antenna? Answer: A hemispherical or cylindrical pattern.
QUESTION
What framework does the IEEEInstitute of Electrical and Electronics Engineers use when developing WLAN standards? Answer:
QUESTION
Which of the following statements is true concerning Bluetooth technology? Answer: The hop rate of Bluetooth devices is about 3,600 hops per second.
Answer: Shorter packet fragments have lower probability of errors from interference than longer packet fragments, but shorter packet fragments require more error correction.
QUESTION
Using the RTS/CTSRequest to Send/Clear to Send protocol allows wireless stations to do which of the following? Answer:
QUESTION
Which is the largest IEEE 802.11 data frame that can traverse a WLANWireless local area network without fragmentation? Answer: 2,346 bytes.
QUESTION
What causes co-channel interference in a WLAN? Answer: An overlap in the signal ranges of AP or different WLANs operating on the same channels.
QUESTION
Which one of the following conditions occurs when an APAccess points receives a distant client's signal at a lower power level than that of a nearer client? Answer: Near/Far
QUESTION
What is a simple solution for resolving a multipath problem caused by reflected waves in a WLAN? Answer:
QUESTION
For maximum security, you should base your WLAN user authentication on which one of the following? Answer: Device-independent schemes, such as user names and passwords.
QUESTION
To prevent hacker access to passwords and IPInternet protocol addresses, why would you want to place wireless APAccess points on switches instead of hubs? Answer: Switches prevent the broadcast of packets to all network segments.
QUESTION
What level of encryption is created by a WEPWired Equivalent Privacy key that uses a 40 - bit secret key concatenated with the IVInitialization vector to form the WEP key? Answer: 64 bit.
QUESTION
What information is vital in order to conduct a successful and thorough site survey for a WLANWireless local area network?
QUESTION
What are the characteristics of ITU-TInternational Telecommunication Union G.657 BIFBend- insensitive fiber? Answer: It is flexible for installation in small spaces and has a small bend radius of 7.5 mm Millimeters or 10 mm.
QUESTION
What are the advantages of loose buffer tube fiber? Answer: It offers the best protection for the fibers under high pulling tension and moisture with its fiber- coated gel.
QUESTION
To break the habit of a negative self-talk cycle? Answer: Tell yourself "not now" and move on to a positive thought whenever negative thoughts occur.
QUESTION
When applying the six-step troubleshooting process for improving one's behaviors and attitudes, which of the following can be used to help resolve a problem? Answer: Talking yourself through the task.
QUESTION
After resolving a DTV Digital TV service problem, what should be done before leaving the jobsite? Answer: Have the customer review the original DTV service problem to verify that the problem is repaired and confirm that all other services are working properly.
QUESTION
Which of the following characterizes the successful troubleshooter? Answer: Someone with an inquisitive and relentless desire to solve and fix problems.
QUESTION
When analyzing a problem, what can the technician learn by asking the customer to show or demonstrate the problem? Answer: The symptoms of the problem can be viewed, and any unusual screens or customer entries can be identified.
QUESTION
In a DOCSISData Over Cable Service Interface Specification network, why is the data throughput over the return or upstream path typically less than the throughput of data over the forward or downstream path? Answer: Compared to the downstream path, the narrower bandwidths and lower orders of modulation used to transport data over the return path cause the downstream and upstream data throughput to be unequal or asymmetrical.
QUESTION
Answer:
QUESTION
Why are WLANWireless local area networks usually deployed in an access capacity instead of as the network's core layer? 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.
QUESTION
Which one of the following RFRadio frequency behaviors is defined as "the bending of a wave as it passes through a medium of different density"? Answer: Refraction.
QUESTION
What condition in an RFRadio frequency circuit can lead to a poor VSWRVoltage standing wave ratio? Answer: An impedance mismatch.
QUESTION
Which statement best describes RFRadio frequency signal gain? Answer:
QUESTION
In a FHSSFrequency-hopping spread spectrum system that uses 10 frequencies across a 12 MHzMegahertz frequency band, what happens if narrowband interference occurs at only one of the 10 frequencies? 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.
QUESTION
Which statement best describes FHSS Frequency-hopping spread spectrum's use of frequency agility? Answer: It refers to a radio's ability to change transmission frequency abruptly within the usable RF Radio frequency band.
QUESTION
Why is spread spectrum technology used in applications such as Bluetooth WPANWireless personal area networks? Answer: Spread spectrum technology allows wireless networking to create a short range, personal communications network.
QUESTION
What is a common fraction written in different forms but having the same value called? Answer: Equivalent fraction.
