NCTI FINAL EXAM:
PROGRESSION FIELD
TECH 2 - 3 TEST EXAM
What should be regularly done after wireless bridges have been installed to ensure
link performance?
Answer: Check throughput.
You are designing a wireless network with several functional workgroups. You want
to configure your enterprise wireless gateway so that you can quickly assign identical
network access rights to persons within the same workgroup. Which enterprise
wireless gateway feature enables this?
Answer: Role-Based Access Control (RBAC).
What are some common methods used to configure and manage Access Points
(APs)?
Answer: Telnet / SSH, USB, built-in web server (browser access).
Polarization is defined as which one of the following?
Answer: The orientation of an electromagnetic wave’s electric field in relation to the
Earth's surface or a reference plane.
In what direction does an omnidirectional antenna radiate RF energy?
Answer: Equally in all directions around its axis.
What is the typical coverage pattern of a semidirectional antenna?
,Answer: A hemispherical or cylindrical pattern (focused in one direction, broader in
others).
Which IEEE standard specifies technologies that use the 2.4-GHz band and run at 54
Mbps?
Answer: IEEE 802.11g.
What causes co-channel interference in a WLAN?
Answer: When two or more wireless networks or access points using the same
channel overlap in their coverage area, interfering with each other.
Which of these is a component used in a Passive Optical Network (PON)?
Answer: Optical splitters.
What is the difference between Fiber-to-the-Node (FTTN) and Fiber-to-the-Curb
(FTTC) topologies?
Answer: FTTC allows fewer RF amplifiers between the optical fiber endpoint and the
customer's premises (i.e. the fiber is brought closer to the customer in FTTC than in
FTTN).
Which type of star topology used in a Passive Optical Network places the PON
splitters into a Fiber Access Terminal (FAT) located deeper in the network, closer to
customer premises than a centralized split?
Answer: Distributed star.
Which PON element uses a Bragg grating filter?
Answer: The Optical Line Terminal (OLT).
Which element of a PON uses patch panels?
Answer: The Optical Distribution Network (ODN).
What is a fiber pigtail?
, Answer: A short length of fiber-optic cable with one end pre-connectorized and the
other end for splicing.
Heat shrink tubing is installed over the fusion splice to strengthen and protect it.
When should the heat shrink be placed on the fiber?
Answer: Before stripping the plastic coating from the fiber (so you can slide the
tubing on before doing the splice).16. In a DOCSIS network, what function does the
CMTS perform?
Answer:
The Cable Modem Termination System (CMTS) manages upstream and downstream
data traffic between cable modems and the service provider’s network, including
provisioning and bandwidth control.
17. When aligning a directional antenna, what tool is commonly used to ensure
precise alignment?
Answer:
A spectrum analyzer or a signal strength meter.
18. Which type of coaxial cable has the lowest attenuation per foot and is best for
long runs?
Answer:
Hardline coaxial cable.
19. What is the purpose of a diplexer in a two-way cable network?
Answer:
To separate upstream and downstream frequency signals so they can travel on the
same coaxial cable without interference.
PROGRESSION FIELD
TECH 2 - 3 TEST EXAM
What should be regularly done after wireless bridges have been installed to ensure
link performance?
Answer: Check throughput.
You are designing a wireless network with several functional workgroups. You want
to configure your enterprise wireless gateway so that you can quickly assign identical
network access rights to persons within the same workgroup. Which enterprise
wireless gateway feature enables this?
Answer: Role-Based Access Control (RBAC).
What are some common methods used to configure and manage Access Points
(APs)?
Answer: Telnet / SSH, USB, built-in web server (browser access).
Polarization is defined as which one of the following?
Answer: The orientation of an electromagnetic wave’s electric field in relation to the
Earth's surface or a reference plane.
In what direction does an omnidirectional antenna radiate RF energy?
Answer: Equally in all directions around its axis.
What is the typical coverage pattern of a semidirectional antenna?
,Answer: A hemispherical or cylindrical pattern (focused in one direction, broader in
others).
Which IEEE standard specifies technologies that use the 2.4-GHz band and run at 54
Mbps?
Answer: IEEE 802.11g.
What causes co-channel interference in a WLAN?
Answer: When two or more wireless networks or access points using the same
channel overlap in their coverage area, interfering with each other.
Which of these is a component used in a Passive Optical Network (PON)?
Answer: Optical splitters.
What is the difference between Fiber-to-the-Node (FTTN) and Fiber-to-the-Curb
(FTTC) topologies?
Answer: FTTC allows fewer RF amplifiers between the optical fiber endpoint and the
customer's premises (i.e. the fiber is brought closer to the customer in FTTC than in
FTTN).
Which type of star topology used in a Passive Optical Network places the PON
splitters into a Fiber Access Terminal (FAT) located deeper in the network, closer to
customer premises than a centralized split?
Answer: Distributed star.
Which PON element uses a Bragg grating filter?
Answer: The Optical Line Terminal (OLT).
Which element of a PON uses patch panels?
Answer: The Optical Distribution Network (ODN).
What is a fiber pigtail?
, Answer: A short length of fiber-optic cable with one end pre-connectorized and the
other end for splicing.
Heat shrink tubing is installed over the fusion splice to strengthen and protect it.
When should the heat shrink be placed on the fiber?
Answer: Before stripping the plastic coating from the fiber (so you can slide the
tubing on before doing the splice).16. In a DOCSIS network, what function does the
CMTS perform?
Answer:
The Cable Modem Termination System (CMTS) manages upstream and downstream
data traffic between cable modems and the service provider’s network, including
provisioning and bandwidth control.
17. When aligning a directional antenna, what tool is commonly used to ensure
precise alignment?
Answer:
A spectrum analyzer or a signal strength meter.
18. Which type of coaxial cable has the lowest attenuation per foot and is best for
long runs?
Answer:
Hardline coaxial cable.
19. What is the purpose of a diplexer in a two-way cable network?
Answer:
To separate upstream and downstream frequency signals so they can travel on the
same coaxial cable without interference.
