NCTI Fiber Install & Activation UPDATED ACTUAL Questions And Correct
Answers
C
Terms in this set (120)
Which standards organization is considered the creator The International Telecommunications Union (ITU)
of the world's most recognized communications
standards, known as recommendations?
In which component in a fiber-optics communication The optical transmitter
system do changes to the intensity of the optical signal
occur?
What is one drawback of using Fabry-Perot (F-P) lasers in The emission of several discrete wavelengths or side modes
high-speed data (HSD) networks?
Why are laser diodes most effective when coupled to The laser diode has a small spectral width, efficient coupling, and fast modulation
single-mode fiber (SMF)? speeds
What is the main factor in determining the sensitivity of an Noise
optical receiver?
Which diode is most commonly used in optical receivers Positive-intrinsic-negative (PIN) diode
because it is inexpensive and can be operated from a
standard power supply?
What does the multiplication process, which amplifies the Noise
electrical signal in an APD, introduce into the electrical
output of an optical detector?
Which type of diode requires a higher voltage power APD
supply and more complex circuitry than PIN diodes?
Which of the following is the ratio of electrical output Responsivity
power from the detector to the optical input power,
expressed by amperes or volts per watt of optical input
power?
What type of LED has relatively narrow spectral widths, Edge-emitting LED
high output power levels, and performs at high
modulation rates?
Why was the zero-dispersion point in SMF moved to To take advantage of SMF's low intrinsic absorption and lower attenuation at 1550
1,550 nm? nm
What type of SMF is ideal for FTTH installations The ITU-T G.657 bend-insensitive fiber (BIF)
, What are the primary causes of intrinsic loss in SMF Material absorption and Rayleigh scattering
Light is guided along the core of a fiber because of this Refractive indexes
difference between the core and cladding
Where would you expect Fresnel reflections to occur in a At connections and mechanical splices where the signal source is entering or
fiber-optic network? exiting the cable
Chromatic dispersion is a combination of which two Material and waveguide dispersion
dispersions?
When defining the optical transport region of SMF, Mode field diameter (MFD)
specifying which of the following is more accurate,
technically correct and critical to use?
What is the current standardization outside diameter (OD) 125 µm, with an accuracy of ±1 µm
of the cladding of SMF?
What do diameter differences between spliced fibers A gain in one direction and a high loss in the opposite direction
look like on an OTDR?
Besides protection, what else must the coating on an Function over a wide temperature range
optical fiber do?
What is involved when monitoring the status of optical The use of a node transponder that continuously monitors several critical
nodes? functions
What is an advantage of a digital return system? 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 DOCSIS
connections to the Internet through their HFC networks
using what standard?
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?
What product based on the DOCSIS defines the PacketCable
protocols for IP telephony over HFC networks?
How does a centralized server VOD architecture simplify The number of servers needed for video content storage is smaller than in the
server management compared to distributed server distributed server architecture
architecture?
Which of the following statements about local ad A video server usually performs local ad insertion
insertion is true?
Answers
C
Terms in this set (120)
Which standards organization is considered the creator The International Telecommunications Union (ITU)
of the world's most recognized communications
standards, known as recommendations?
In which component in a fiber-optics communication The optical transmitter
system do changes to the intensity of the optical signal
occur?
What is one drawback of using Fabry-Perot (F-P) lasers in The emission of several discrete wavelengths or side modes
high-speed data (HSD) networks?
Why are laser diodes most effective when coupled to The laser diode has a small spectral width, efficient coupling, and fast modulation
single-mode fiber (SMF)? speeds
What is the main factor in determining the sensitivity of an Noise
optical receiver?
Which diode is most commonly used in optical receivers Positive-intrinsic-negative (PIN) diode
because it is inexpensive and can be operated from a
standard power supply?
What does the multiplication process, which amplifies the Noise
electrical signal in an APD, introduce into the electrical
output of an optical detector?
Which type of diode requires a higher voltage power APD
supply and more complex circuitry than PIN diodes?
Which of the following is the ratio of electrical output Responsivity
power from the detector to the optical input power,
expressed by amperes or volts per watt of optical input
power?
What type of LED has relatively narrow spectral widths, Edge-emitting LED
high output power levels, and performs at high
modulation rates?
Why was the zero-dispersion point in SMF moved to To take advantage of SMF's low intrinsic absorption and lower attenuation at 1550
1,550 nm? nm
What type of SMF is ideal for FTTH installations The ITU-T G.657 bend-insensitive fiber (BIF)
, What are the primary causes of intrinsic loss in SMF Material absorption and Rayleigh scattering
Light is guided along the core of a fiber because of this Refractive indexes
difference between the core and cladding
Where would you expect Fresnel reflections to occur in a At connections and mechanical splices where the signal source is entering or
fiber-optic network? exiting the cable
Chromatic dispersion is a combination of which two Material and waveguide dispersion
dispersions?
When defining the optical transport region of SMF, Mode field diameter (MFD)
specifying which of the following is more accurate,
technically correct and critical to use?
What is the current standardization outside diameter (OD) 125 µm, with an accuracy of ±1 µm
of the cladding of SMF?
What do diameter differences between spliced fibers A gain in one direction and a high loss in the opposite direction
look like on an OTDR?
Besides protection, what else must the coating on an Function over a wide temperature range
optical fiber do?
What is involved when monitoring the status of optical The use of a node transponder that continuously monitors several critical
nodes? functions
What is an advantage of a digital return system? 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 DOCSIS
connections to the Internet through their HFC networks
using what standard?
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?
What product based on the DOCSIS defines the PacketCable
protocols for IP telephony over HFC networks?
How does a centralized server VOD architecture simplify The number of servers needed for video content storage is smaller than in the
server management compared to distributed server distributed server architecture
architecture?
Which of the following statements about local ad A video server usually performs local ad insertion
insertion is true?
