NCTI FIBER INSTALL & ACTIVATION EXAM AND
PRACTICE EXAM NEWEST 2026 TEST BANK|
COMPLETE 200 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ ALREADY GRADED
A+ (MOST RECENT!!)
What type of LED has relatively narrow spectral widths, high output
power levels, and performs at high modulation rates? – ANSWER -
Edge-emitting LED
Why was the zero-dispersion point in SMF moved to 1,550 nm? –
ANSWER - To take advantage of SMF's low intrinsic absorption and
lower attenuation at 1550 nm
What type of SMF is ideal for FTTH installations – ANSWER - The
ITU-T G.657 bend-insensitive fiber (BIF)
What are the primary causes of intrinsic loss in SMF – ANSWER -
Material absorption and Rayleigh scattering
Light is guided along the core of a fiber because of this difference
between the core and cladding – ANSWER - Refractive indexes
pg. 1
,Where would you expect Fresnel reflections to occur in a fiber-optic
network? – ANSWER - At connections and mechanical splices where
the signal source is entering or exiting the cable
Chromatic dispersion is a combination of which two dispersions? –
ANSWER - Material and waveguide dispersion
When defining the optical transport region of SMF, specifying which of
the following is more accurate, technically correct and critical to use? –
ANSWER - Mode field diameter (MFD)
What is the current standardization outside diameter (OD) of the
cladding of SMF? – ANSWER - 125 µm, with an accuracy of ±1 µm
What do diameter differences between spliced fibers look like on an
OTDR? – ANSWER - A gain in one direction and a high loss in the
opposite direction
Besides protection, what else must the coating on an optical fiber do? –
ANSWER - Function over a wide temperature range
What is involved when monitoring the status of optical nodes? –
ANSWER - The use of a node transponder that continuously monitors
several critical functions
pg. 2
,What is an advantage of a digital return system? – ANSWER - The
amount of fiber required in the network can be greatly reduced by using
dense wavelength division multiplexing (DWDM) digital return
transmitters in hub-to-headend architectures
Broadband cable operators provide customers with HSD connections to
the Internet through their HFC networks using what standard? –
ANSWER - DOCSIS
Which fiber-optic cable design category typically uses some star
topology – ANSWER - Signal distribution
What is the ideal way for a broadband cable network designer to plan the
replacement of coaxial cable with fiber-optic cable to shorten amplifier
cascades? – ANSWER - Use the existing coaxial network infrastructure
What is an option for a broadband cable network to maximize the use of
its optical fiber resources? – ANSWER - Leasing spare fibers
Which of these items should be identified on a route map so that the
design can provide (or not provide) special network access? – ANSWER
- Parks
Which type of map contains node information – ANSWER - Design map
pg. 3
, When activating a fiber-optic network, which acceptance-testing stage
includes adjusting attenuation levels for the first time? – ANSWER -
During equipment activation
What information should always be included in fiber-optic network
documentation? – ANSWER - Fiber assignments
When troubleshooting an outage in an optical network, why would a
technician want to refer to the network's as-built documentation? –
ANSWER - To help determine specific cable lengths
What is an example of transport media in a telecommunications
network? – ANSWER - Coaxial cable
Which topology consists of a host element connected to two or more
receiving elements through a splitter or optical coupler? – ANSWER -
Point-to-multipoint (P2MP) topology
Which type of network topology allows troubleshooting a problem or
switching around the problem to be accomplished easily from the central
hub? – ANSWER - Star
Which type of network topology has been focused primarily on
alternative routing around cities and industrial areas? – ANSWER - Ring
pg. 4
PRACTICE EXAM NEWEST 2026 TEST BANK|
COMPLETE 200 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ ALREADY GRADED
A+ (MOST RECENT!!)
What type of LED has relatively narrow spectral widths, high output
power levels, and performs at high modulation rates? – ANSWER -
Edge-emitting LED
Why was the zero-dispersion point in SMF moved to 1,550 nm? –
ANSWER - To take advantage of SMF's low intrinsic absorption and
lower attenuation at 1550 nm
What type of SMF is ideal for FTTH installations – ANSWER - The
ITU-T G.657 bend-insensitive fiber (BIF)
What are the primary causes of intrinsic loss in SMF – ANSWER -
Material absorption and Rayleigh scattering
Light is guided along the core of a fiber because of this difference
between the core and cladding – ANSWER - Refractive indexes
pg. 1
,Where would you expect Fresnel reflections to occur in a fiber-optic
network? – ANSWER - At connections and mechanical splices where
the signal source is entering or exiting the cable
Chromatic dispersion is a combination of which two dispersions? –
ANSWER - Material and waveguide dispersion
When defining the optical transport region of SMF, specifying which of
the following is more accurate, technically correct and critical to use? –
ANSWER - Mode field diameter (MFD)
What is the current standardization outside diameter (OD) of the
cladding of SMF? – ANSWER - 125 µm, with an accuracy of ±1 µm
What do diameter differences between spliced fibers look like on an
OTDR? – ANSWER - A gain in one direction and a high loss in the
opposite direction
Besides protection, what else must the coating on an optical fiber do? –
ANSWER - Function over a wide temperature range
What is involved when monitoring the status of optical nodes? –
ANSWER - The use of a node transponder that continuously monitors
several critical functions
pg. 2
,What is an advantage of a digital return system? – ANSWER - The
amount of fiber required in the network can be greatly reduced by using
dense wavelength division multiplexing (DWDM) digital return
transmitters in hub-to-headend architectures
Broadband cable operators provide customers with HSD connections to
the Internet through their HFC networks using what standard? –
ANSWER - DOCSIS
Which fiber-optic cable design category typically uses some star
topology – ANSWER - Signal distribution
What is the ideal way for a broadband cable network designer to plan the
replacement of coaxial cable with fiber-optic cable to shorten amplifier
cascades? – ANSWER - Use the existing coaxial network infrastructure
What is an option for a broadband cable network to maximize the use of
its optical fiber resources? – ANSWER - Leasing spare fibers
Which of these items should be identified on a route map so that the
design can provide (or not provide) special network access? – ANSWER
- Parks
Which type of map contains node information – ANSWER - Design map
pg. 3
, When activating a fiber-optic network, which acceptance-testing stage
includes adjusting attenuation levels for the first time? – ANSWER -
During equipment activation
What information should always be included in fiber-optic network
documentation? – ANSWER - Fiber assignments
When troubleshooting an outage in an optical network, why would a
technician want to refer to the network's as-built documentation? –
ANSWER - To help determine specific cable lengths
What is an example of transport media in a telecommunications
network? – ANSWER - Coaxial cable
Which topology consists of a host element connected to two or more
receiving elements through a splitter or optical coupler? – ANSWER -
Point-to-multipoint (P2MP) topology
Which type of network topology allows troubleshooting a problem or
switching around the problem to be accomplished easily from the central
hub? – ANSWER - Star
Which type of network topology has been focused primarily on
alternative routing around cities and industrial areas? – ANSWER - Ring
pg. 4
