Fiber Install and Activation Exam Questions And Answers Latest Update
Fiber Install and Activation Exam
Questions And Answers Latest Update
Which standards organization is considered to be the creator of the worlds' most recognized
communications standards, known as "recommendations"? - ✔✔✔ - The International
Telecommunications Union (ITU)
In which component in a fiber-optics communication system do changes to the intensity of the optical
signal occur? - ✔✔✔ - The optical transmitter
What is a drawback of using Fabry-Perot (F-P)lasers in high-speed data (HSD) networks? - ✔✔✔ - The
emission of a number of discrete wavelengths or side modes.
Why are laser diodes most effective when coupled to singlemode fiber? - ✔✔✔ - Its high coupled
power, directionality, and speed.
What are the factors that contribute to an optical receiver's sensitivity? - ✔✔✔ - Noise, responsivity,
response time, linear response, back reflection, optical detector.
What is a positive-intrinsic-negative (PIN) diode? - ✔✔✔ - An optical detector with current flow that is
linear to the intensity of light photons, with one electron/hole pair created for every absorbed photon
until saturation.
What does the amplification process in an avalanche photodiode (APD) introduce into the electrical
output of an optical detector? - ✔✔✔ - Noise
What function does the detector in an optical receiver perform? - ✔✔✔ - Conversion of an optical
carrier to an electrical signal, and demodulation of the modulated optical carrier.
©®™ Page 1
,Fiber Install and Activation Exam Questions And Answers Latest Update
What happens if the optical signal exceeds the maximum specified input power into a photodetector? -
✔✔✔ - Nonlinear operation resulting in distortion, data errors, and signal loss.
What is a characteristic of light in a laser beam? - ✔✔✔ - The laser beam consists of a limited range of
wavelengths (monochromatic), with all light waves in phase (coherent light).
Monitoring the status of optical nodes - ✔✔✔ - Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - ✔✔✔ - Use dense wavelength division multiplexing (DWDM) digital
return transmitters in hub-to-headend architectures.
What is channel bonding? - ✔✔✔ - A 3.0 revision to DOCSIS that significantly increases upstream and
downstream transport data rates.
What is MPEG? - ✔✔✔ - A universally accepted standard for digital television, first released in 1992.
Which of the following is true about optical nodes? - ✔✔✔ - They contain four main sections: the
optical receiver, the RF amplifier module, the reverse optical transmitter, and the DC power supply.
Internet protocol telephony systems in broadband cable networks - ✔✔✔ - Require a call management
server, media gateway, signaling gateway, billing system, and CMTS.
In a centralized server video-on-demand architecture - ✔✔✔ - The number of servers needed for video
content storage is smaller than in the distributed server architecture.
Which of the following statements about local ad insertion is true? - ✔✔✔ - Local ad insertion is
performed usually by a video server.
©®™ Page 2
, Fiber Install and Activation Exam Questions And Answers Latest Update
In regard to providing high-speed data service, - ✔✔✔ - The CMTS can provide a data transfer rate up
to 38 Mbps, using 256-QAM in a single 6Mhz channel.
Which of the following is true about the SONET transmission standard? - ✔✔✔ - SONET is the North
American standard used for telephony applications.
Why was the zero-dispersion point in single-mode fiber moved to 1,550 nm? - ✔✔✔ - To take
advantage of the low intrinsic absorption and lower attenuation at 1550 nm in single-mode fiber
What type of single-mode fiber is intended for fiber-to-the-home installations? - ✔✔✔ - The ITU-T
G.657 bend-insensitive fiber (BIF)
What are the primary causes of intrinsic loss in single-mode fiber? - ✔✔✔ - Material absorption and
Rayleigh scattering.
The phenomenon, total internal reflection, is what enables an optical fiber to guide light. What
characteristic of optical fiber causes total internal reflection? - ✔✔✔ - The difference in refractive
indexes, between cladding and core, causes light to be reflected off the cladding and back into the core
along the optical fiber.
Where would you expect Fresnel reflections to occur in a fiber-optic network? - ✔✔✔ - At connections
and mechanical splices where the signal source is entering or exiting the cable.
Chromatic dispersion is a combination of which two dispersions? - ✔✔✔ - Material and waveguide
dispersion.
What is one advantage and one disadvantage of single-mode fiber with a large mode field diameter? -
✔✔✔ - The larger the MFD, the easier it is to splice and connectrorize the fiber, although it becomes
more sensitive to bending losses.
©®™ Page 3
Fiber Install and Activation Exam
Questions And Answers Latest Update
Which standards organization is considered to be the creator of the worlds' most recognized
communications standards, known as "recommendations"? - ✔✔✔ - The International
Telecommunications Union (ITU)
In which component in a fiber-optics communication system do changes to the intensity of the optical
signal occur? - ✔✔✔ - The optical transmitter
What is a drawback of using Fabry-Perot (F-P)lasers in high-speed data (HSD) networks? - ✔✔✔ - The
emission of a number of discrete wavelengths or side modes.
Why are laser diodes most effective when coupled to singlemode fiber? - ✔✔✔ - Its high coupled
power, directionality, and speed.
What are the factors that contribute to an optical receiver's sensitivity? - ✔✔✔ - Noise, responsivity,
response time, linear response, back reflection, optical detector.
What is a positive-intrinsic-negative (PIN) diode? - ✔✔✔ - An optical detector with current flow that is
linear to the intensity of light photons, with one electron/hole pair created for every absorbed photon
until saturation.
What does the amplification process in an avalanche photodiode (APD) introduce into the electrical
output of an optical detector? - ✔✔✔ - Noise
What function does the detector in an optical receiver perform? - ✔✔✔ - Conversion of an optical
carrier to an electrical signal, and demodulation of the modulated optical carrier.
©®™ Page 1
,Fiber Install and Activation Exam Questions And Answers Latest Update
What happens if the optical signal exceeds the maximum specified input power into a photodetector? -
✔✔✔ - Nonlinear operation resulting in distortion, data errors, and signal loss.
What is a characteristic of light in a laser beam? - ✔✔✔ - The laser beam consists of a limited range of
wavelengths (monochromatic), with all light waves in phase (coherent light).
Monitoring the status of optical nodes - ✔✔✔ - Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - ✔✔✔ - Use dense wavelength division multiplexing (DWDM) digital
return transmitters in hub-to-headend architectures.
What is channel bonding? - ✔✔✔ - A 3.0 revision to DOCSIS that significantly increases upstream and
downstream transport data rates.
What is MPEG? - ✔✔✔ - A universally accepted standard for digital television, first released in 1992.
Which of the following is true about optical nodes? - ✔✔✔ - They contain four main sections: the
optical receiver, the RF amplifier module, the reverse optical transmitter, and the DC power supply.
Internet protocol telephony systems in broadband cable networks - ✔✔✔ - Require a call management
server, media gateway, signaling gateway, billing system, and CMTS.
In a centralized server video-on-demand architecture - ✔✔✔ - The number of servers needed for video
content storage is smaller than in the distributed server architecture.
Which of the following statements about local ad insertion is true? - ✔✔✔ - Local ad insertion is
performed usually by a video server.
©®™ Page 2
, Fiber Install and Activation Exam Questions And Answers Latest Update
In regard to providing high-speed data service, - ✔✔✔ - The CMTS can provide a data transfer rate up
to 38 Mbps, using 256-QAM in a single 6Mhz channel.
Which of the following is true about the SONET transmission standard? - ✔✔✔ - SONET is the North
American standard used for telephony applications.
Why was the zero-dispersion point in single-mode fiber moved to 1,550 nm? - ✔✔✔ - To take
advantage of the low intrinsic absorption and lower attenuation at 1550 nm in single-mode fiber
What type of single-mode fiber is intended for fiber-to-the-home installations? - ✔✔✔ - The ITU-T
G.657 bend-insensitive fiber (BIF)
What are the primary causes of intrinsic loss in single-mode fiber? - ✔✔✔ - Material absorption and
Rayleigh scattering.
The phenomenon, total internal reflection, is what enables an optical fiber to guide light. What
characteristic of optical fiber causes total internal reflection? - ✔✔✔ - The difference in refractive
indexes, between cladding and core, causes light to be reflected off the cladding and back into the core
along the optical fiber.
Where would you expect Fresnel reflections to occur in a fiber-optic network? - ✔✔✔ - At connections
and mechanical splices where the signal source is entering or exiting the cable.
Chromatic dispersion is a combination of which two dispersions? - ✔✔✔ - Material and waveguide
dispersion.
What is one advantage and one disadvantage of single-mode fiber with a large mode field diameter? -
✔✔✔ - The larger the MFD, the easier it is to splice and connectrorize the fiber, although it becomes
more sensitive to bending losses.
©®™ Page 3
