NCTI INSTALLER BOOK 2026 CERTIFICATION
EVALUATION 151 QUESTIONS ANSWERS
EXPERT APPROVED
◉ In data networking, this term is defined as "Signals may flow in either
direction, but not simultaneously". Answer: Half-duplex
◉ Two CPUs have the same size data bus. Which one will process data
faster? Answer: The one with a higher clock speed
◉ This unique ID number is coordinated by the Institute of Electrical
and Electronics Engineers and is used by only one network interface
card anywhere in the world. Answer: Media access control address
(MAC)
◉ Which is a network management and utility software that is typically
used by network administrators and information systems personnel when
the network is unused or lightly used, often in the middle of the night?
Answer: Backup and recovery utilities.
◉ Which of the following is also called "Thicknet" or "yellow wire" and
includes two layers of foil shielding as well as an additional copper
mesh shield? Answer: 10Base5 cable
, ◉ According to 10BaseT wiring rules, what is the maximum segment
length without a repeater? Answer: 100 m
◉ When light travels through a fiber-optic cable, the change in refractive
index causes the light to refract off which of the following? Answer: The
boundary between the core and the cladding
◉ Which of the following requires a laser transmitter? Answer: Single-
mode fiber
◉ In what part of a building would you typically find punch-down
blocks? Answer: Wiring closet
◉ Encapsulation and protocol headers, decapsulation, and reassembly
are three of the four basic techniques used whenever different layers of
protocols work together. What is the fourth? Answer: Segmentation
◉ Which type of address is unique anywhere in the world? Answer: NIC
address
◉ Which layer of the OSI protocol stack handles frames? Answer: Data
Link
◉ Which of the following best represents a logical address? Answer:
IPv6
EVALUATION 151 QUESTIONS ANSWERS
EXPERT APPROVED
◉ In data networking, this term is defined as "Signals may flow in either
direction, but not simultaneously". Answer: Half-duplex
◉ Two CPUs have the same size data bus. Which one will process data
faster? Answer: The one with a higher clock speed
◉ This unique ID number is coordinated by the Institute of Electrical
and Electronics Engineers and is used by only one network interface
card anywhere in the world. Answer: Media access control address
(MAC)
◉ Which is a network management and utility software that is typically
used by network administrators and information systems personnel when
the network is unused or lightly used, often in the middle of the night?
Answer: Backup and recovery utilities.
◉ Which of the following is also called "Thicknet" or "yellow wire" and
includes two layers of foil shielding as well as an additional copper
mesh shield? Answer: 10Base5 cable
, ◉ According to 10BaseT wiring rules, what is the maximum segment
length without a repeater? Answer: 100 m
◉ When light travels through a fiber-optic cable, the change in refractive
index causes the light to refract off which of the following? Answer: The
boundary between the core and the cladding
◉ Which of the following requires a laser transmitter? Answer: Single-
mode fiber
◉ In what part of a building would you typically find punch-down
blocks? Answer: Wiring closet
◉ Encapsulation and protocol headers, decapsulation, and reassembly
are three of the four basic techniques used whenever different layers of
protocols work together. What is the fourth? Answer: Segmentation
◉ Which type of address is unique anywhere in the world? Answer: NIC
address
◉ Which layer of the OSI protocol stack handles frames? Answer: Data
Link
◉ Which of the following best represents a logical address? Answer:
IPv6
