NCTI FIBER INSTALL & ACTIVATION
EXAM AND PRACTICE EXAM NEWEST
2026 TEST BANK| COMPLETE 300 REAL
EXAM QUESTIONS AND CORRECT
VERIFIED ANSWERS/ ALREADY GRADED
A+ (MOST RECENT!!)
1. All fiber-optic communication systems must contain:
A: An optical fiber transmission medium
2. The optical fiber core:
A: Transmits the optical signal, and its structure and chemical
makeup are critical to fiber operation
3. As a lightwave enters an optical fiber:
A: Its speed decreases, and the lightwave refracts at an angle
, 4. Attenuation in fiber:
A: Can be caused by absorption, scattering, macrobends, and
fiber numerical aperture mismatch
5. Which of the following is not an advantage of optical fiber?
A: Fiber carries more electrical current and radiates more energy
than coaxial cable
6. Light is guided along the core of a fiber because of this
difference between the core and cladding:
A: Refractive indexes
7. What is the current standardization outside diameter (OD)
of the cladding of SMF?
A: 125 µm, with an accuracy of ±1 µm
8. Chromatic dispersion is a combination of which two
dispersions?
, A: Material and waveguide dispersion
9. Where would you expect Fresnel reflections to occur in a
fiber-optic network?
A: At connections and mechanical splices where the signal source
is entering or exiting the cable
10. In which component in a fiber-optics communication
system do changes to the intensity of the optical signal occur?
A: The optical transmitter
11. What is one drawback of using Fabry-Perot (F-P) lasers in
high-speed data (HSD) networks?
A: The emission of several discrete wavelengths or side modes
12. Which diode is most commonly used in optical receivers
because it is inexpensive and can be operated from a
standard power supply?
A: Positive-intrinsic-negative (PIN) diode
, 13. What is the main factor in determining the sensitivity of
an optical receiver?
A: Noise
14. Which type of diode requires a higher voltage power
supply and more complex circuitry than PIN diodes?
A: APD (Avalanche Photodiode)
15. Which of the following best describes how the signal is
transported through the network without following the
physical path requirements of the peripherals?
A: Logical topology
16. Which topology consists of a host element connected to
two or more receiving elements through a splitter or optical
coupler?
A: Point-to-multipoint (P2MP) topology
EXAM AND PRACTICE EXAM NEWEST
2026 TEST BANK| COMPLETE 300 REAL
EXAM QUESTIONS AND CORRECT
VERIFIED ANSWERS/ ALREADY GRADED
A+ (MOST RECENT!!)
1. All fiber-optic communication systems must contain:
A: An optical fiber transmission medium
2. The optical fiber core:
A: Transmits the optical signal, and its structure and chemical
makeup are critical to fiber operation
3. As a lightwave enters an optical fiber:
A: Its speed decreases, and the lightwave refracts at an angle
, 4. Attenuation in fiber:
A: Can be caused by absorption, scattering, macrobends, and
fiber numerical aperture mismatch
5. Which of the following is not an advantage of optical fiber?
A: Fiber carries more electrical current and radiates more energy
than coaxial cable
6. Light is guided along the core of a fiber because of this
difference between the core and cladding:
A: Refractive indexes
7. What is the current standardization outside diameter (OD)
of the cladding of SMF?
A: 125 µm, with an accuracy of ±1 µm
8. Chromatic dispersion is a combination of which two
dispersions?
, A: Material and waveguide dispersion
9. Where would you expect Fresnel reflections to occur in a
fiber-optic network?
A: At connections and mechanical splices where the signal source
is entering or exiting the cable
10. In which component in a fiber-optics communication
system do changes to the intensity of the optical signal occur?
A: The optical transmitter
11. What is one drawback of using Fabry-Perot (F-P) lasers in
high-speed data (HSD) networks?
A: The emission of several discrete wavelengths or side modes
12. Which diode is most commonly used in optical receivers
because it is inexpensive and can be operated from a
standard power supply?
A: Positive-intrinsic-negative (PIN) diode
, 13. What is the main factor in determining the sensitivity of
an optical receiver?
A: Noise
14. Which type of diode requires a higher voltage power
supply and more complex circuitry than PIN diodes?
A: APD (Avalanche Photodiode)
15. Which of the following best describes how the signal is
transported through the network without following the
physical path requirements of the peripherals?
A: Logical topology
16. Which topology consists of a host element connected to
two or more receiving elements through a splitter or optical
coupler?
A: Point-to-multipoint (P2MP) topology
