Fiber Install and Activation Exam Review Guide: Answered 2025
Which standards organization is considered to be the creator of the worlds' most recognized
communications standards, known as "recommendations"? - (answers)The International
Telecommunications Union (ITU)
In which component in a fiber-optics communication system do changes to the intensity of the
optical signal occur? - (answers)The optical transmitter
What is a drawback of using Fabry-Perot (F-P)lasers in high-speed data (HSD) networks? -
(answers)The emission of a number of discrete wavelengths or side modes.
Why are laser diodes most effective when coupled to singlemode fiber? - (answers)Its high
coupled power, directionality, and speed.
What are the factors that contribute to an optical receiver's sensitivity? - (answers)Noise,
responsivity, response time, linear response, back reflection, optical detector.
What is a positive-intrinsic-negative (PIN) diode? - (answers)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? - (answers)Noise
What function does the detector in an optical receiver perform? - (answers)Conversion of an
optical carrier to an electrical signal, and demodulation of the modulated optical carrier.
What happens if the optical signal exceeds the maximum specified input power into a
photodetector? - (answers)Nonlinear operation resulting in distortion, data errors, and signal loss.
What is a characteristic of light in a laser beam? - (answers)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 - (answers)Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - (answers)Use dense wavelength division multiplexing
(DWDM) digital return transmitters in hub-to-headend architectures.
What is channel bonding? - (answers)A 3.0 revision to DOCSIS that significantly increases
upstream and downstream transport data rates.
What is MPEG? - (answers)A universally accepted standard for digital television, first released
in 1992.
Which of the following is true about optical nodes? - (answers)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 - (answers)Require a call
management server, media gateway, signaling gateway, billing system, and CMTS.
In a centralized server video-on-demand architecture - (answers)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? - (answers)Local ad insertion
is performed usually by a video server.
In regard to providing high-speed data service, - (answers)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? - (answers)SONET is
the North American standard used for telephony applications.
Which standards organization is considered to be the creator of the worlds' most recognized
communications standards, known as "recommendations"? - (answers)The International
Telecommunications Union (ITU)
In which component in a fiber-optics communication system do changes to the intensity of the
optical signal occur? - (answers)The optical transmitter
What is a drawback of using Fabry-Perot (F-P)lasers in high-speed data (HSD) networks? -
(answers)The emission of a number of discrete wavelengths or side modes.
Why are laser diodes most effective when coupled to singlemode fiber? - (answers)Its high
coupled power, directionality, and speed.
What are the factors that contribute to an optical receiver's sensitivity? - (answers)Noise,
responsivity, response time, linear response, back reflection, optical detector.
What is a positive-intrinsic-negative (PIN) diode? - (answers)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? - (answers)Noise
What function does the detector in an optical receiver perform? - (answers)Conversion of an
optical carrier to an electrical signal, and demodulation of the modulated optical carrier.
What happens if the optical signal exceeds the maximum specified input power into a
photodetector? - (answers)Nonlinear operation resulting in distortion, data errors, and signal loss.
What is a characteristic of light in a laser beam? - (answers)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 - (answers)Involves the use of a node transponder that
continuously monitors a number of critical functions.
Digital return path transmissions - (answers)Use dense wavelength division multiplexing
(DWDM) digital return transmitters in hub-to-headend architectures.
What is channel bonding? - (answers)A 3.0 revision to DOCSIS that significantly increases
upstream and downstream transport data rates.
What is MPEG? - (answers)A universally accepted standard for digital television, first released
in 1992.
Which of the following is true about optical nodes? - (answers)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 - (answers)Require a call
management server, media gateway, signaling gateway, billing system, and CMTS.
In a centralized server video-on-demand architecture - (answers)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? - (answers)Local ad insertion
is performed usually by a video server.
In regard to providing high-speed data service, - (answers)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? - (answers)SONET is
the North American standard used for telephony applications.
