REP 1 REP 2 EXAMINATION TEST 2026
VERIFIED QUESTIONS AND CORRECT
SOLUTIONS GRADED A+
⩥ In a fiber optic cable, what is the purpose of the cladding? Answer: To
guide the light down the fiber
⩥ You are planning a fiber optic network and want to amplify the signal
so you can send it farther into the field. At which wavelength must the
laser emit? Answer: 1550 nm
⩥ It is important to follow safety procedures when installing and
handling fiber optic cable. What should you use to pick up fiber pieces
after you splice a cable? Answer: Tweezers
⩥ You are doing an aerial installation of fiber optic cable. When you
survey the installation path, you see that the path runs near several short
outbuildings and over a series of hedges. Which installation method
should you use? Answer: The pull in method
⩥ Poor performance in the fiber optic network leads you to believe that
there is a fault in the fiber optic cable and you want to test a section of
the network with an optical time domain reflectometer OTDR, How
should you connect the OTDR to the fiber optic cable? Answer: With an
optical mechanical splice
,⩥ As you prepare to set up the fiber optic network, you realize you need
a coupler that will allow any of its ports to be used as either input or
output. Which coupler should you choose? Answer: A reflective star
coupler
⩥ As cable companies have expanded their use of fiber optic cable, they
have also brought it closer to the customer premises, increasing the
bandwidth available to customers. Which answer below represents the
progression of fiber optic network architecture? Answer: Fiber to the
feeder *FTTF* - Fiber to the neighborhood *FTTN* - Fiber to the curb
*FTTC* - and Fiber to the home *FTTH*
⩥ Why is the broadband cable industry developing its own passive
optical network (PON) standard instead of using standards already
developed by the International Telecommunication Union (ITU) and the
Institute of Electrical and Electronics Engineers (IEEE) Answer: The
industry has invested a lot of money in HFC Networks, Data Over Cable
Service Interface Specification, and other systems and devices that are
still currently being used, but they are not compatible with ITU and
IEEE PON standards.
⩥ What serves as an amplifier in fiber optic networks, allowing light
signals to travel farther while retaining signal strength? Answer: EDFA,
An erbium-doped fiber amplifier
, ⩥ What is the name of the group that established standards for the
television industry, ensuring a single system would deliver consistent
service across the nation? Answer: The National Television System
Committee (NTSC)
⩥ What signal modulation technique do cable operators use to transport
digital television signals through the cable network? Answer: QAM
Quadrature Amplitude Modulation
⩥ What is the major change in enhanced definition TV (EDTV) that
improves picture quality over SDTV Answer: The use of progressive
scanning in EDTV
⩥ What legislation required all television stations to switch to digital
only broadcasting? Answer: The US Deficit Reduction Act
⩥ Why are digital terminal adapters more cost effective than a full
featured set top box? Answer: DTA's do not require RF upstream
⩥ What terrestrial transmission technology did the Advanced Television
Systems Committee (ATSC) select? Answer: Eight level vestigial
sideband (8-VSB)
⩥ Which system advanced television to high definition? Answer: MUSE
The multiple sub-Nyquist sampling encoding system
VERIFIED QUESTIONS AND CORRECT
SOLUTIONS GRADED A+
⩥ In a fiber optic cable, what is the purpose of the cladding? Answer: To
guide the light down the fiber
⩥ You are planning a fiber optic network and want to amplify the signal
so you can send it farther into the field. At which wavelength must the
laser emit? Answer: 1550 nm
⩥ It is important to follow safety procedures when installing and
handling fiber optic cable. What should you use to pick up fiber pieces
after you splice a cable? Answer: Tweezers
⩥ You are doing an aerial installation of fiber optic cable. When you
survey the installation path, you see that the path runs near several short
outbuildings and over a series of hedges. Which installation method
should you use? Answer: The pull in method
⩥ Poor performance in the fiber optic network leads you to believe that
there is a fault in the fiber optic cable and you want to test a section of
the network with an optical time domain reflectometer OTDR, How
should you connect the OTDR to the fiber optic cable? Answer: With an
optical mechanical splice
,⩥ As you prepare to set up the fiber optic network, you realize you need
a coupler that will allow any of its ports to be used as either input or
output. Which coupler should you choose? Answer: A reflective star
coupler
⩥ As cable companies have expanded their use of fiber optic cable, they
have also brought it closer to the customer premises, increasing the
bandwidth available to customers. Which answer below represents the
progression of fiber optic network architecture? Answer: Fiber to the
feeder *FTTF* - Fiber to the neighborhood *FTTN* - Fiber to the curb
*FTTC* - and Fiber to the home *FTTH*
⩥ Why is the broadband cable industry developing its own passive
optical network (PON) standard instead of using standards already
developed by the International Telecommunication Union (ITU) and the
Institute of Electrical and Electronics Engineers (IEEE) Answer: The
industry has invested a lot of money in HFC Networks, Data Over Cable
Service Interface Specification, and other systems and devices that are
still currently being used, but they are not compatible with ITU and
IEEE PON standards.
⩥ What serves as an amplifier in fiber optic networks, allowing light
signals to travel farther while retaining signal strength? Answer: EDFA,
An erbium-doped fiber amplifier
, ⩥ What is the name of the group that established standards for the
television industry, ensuring a single system would deliver consistent
service across the nation? Answer: The National Television System
Committee (NTSC)
⩥ What signal modulation technique do cable operators use to transport
digital television signals through the cable network? Answer: QAM
Quadrature Amplitude Modulation
⩥ What is the major change in enhanced definition TV (EDTV) that
improves picture quality over SDTV Answer: The use of progressive
scanning in EDTV
⩥ What legislation required all television stations to switch to digital
only broadcasting? Answer: The US Deficit Reduction Act
⩥ Why are digital terminal adapters more cost effective than a full
featured set top box? Answer: DTA's do not require RF upstream
⩥ What terrestrial transmission technology did the Advanced Television
Systems Committee (ATSC) select? Answer: Eight level vestigial
sideband (8-VSB)
⩥ Which system advanced television to high definition? Answer: MUSE
The multiple sub-Nyquist sampling encoding system
