Chapter 1: Principles of Transmission
Exam 2025 Questions and Answers
100% Pass
100 Gb/s - ✔✔Multimode optical fiber is best suited for premises applications
where links are less than ≈100m (328ft) for data rates of _____ or less.
- 155 mb/s
- 1 gb/s
- 10 gb/s
- 100 gb/s
Return Loss - ✔✔For balanced twisted-pair cabling, _______ is the ratio between the
transmitted power and the reflected power expressed in dBs.
Solid - ✔✔When comparing stranded conductors to solid conductors, and advantage
of _____ conductors is less resistance.
True - ✔✔(ToF) Digital data can be transmitted noise free over essentially unlimited
distances if the digital data received and regenerated at intervals before it is
degraded by added noise.
True - ✔✔(ToF) Free space loss is the signal attenuation that would result if all
reflection, refraction, scattering, diffraction, and absorption influences were
removed.
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
,400 Gb/s - ✔✔GigE is being deployed on many optical fiber networks. Typical IEEE
recognized GigE network speeds in the MAN and WAN environment can be as high
as:
True - ✔✔(ToF) Increasing the length of an optical fiber link can result in an increase
in total signal attenuation.
780 nm - ✔✔The center wavelength of short wavelength lasers is:
False - ✔✔(ToF) Stranded conductors have better transmission performance at high
frequencies than solid conductors.
At least twice - ✔✔Analog signals can be converted into a digital signal by a multi-
step process. The Sampling rate used must be ______ the highest frequency
component of the analog signal.
DS2 - ✔✔Which of the following North American multiplexing levels has a data rate
of 6.312 Mb/s?
1.0 dB/km - ✔✔The maximum cable attenuation coefficient for single mode inside
plant optical fiber cable at a wavelength of 1383 nm is:
SDH (Synchronous Digital Hierarchy) - ✔✔Standards have been established for
optical fiber carrier transmission. The international standard is:
Short wavelength laser - ✔✔Which of the following multimode optical fiber
transmitters has a spectral width of 4 nm?
Increasing - ✔✔The transmission characteristics of conductors pairs vary with
frequency. ______ the frequency increases the speed of transmission through cable
pairs.
Carrier - ✔✔Which one of the following is not a type of modulation used in wireless
transmission?
More - ✔✔Stranded conductor cable has _____ attenuation than solid conductor
cable.
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
, 780 nm - ✔✔Optical fiber transmitters emit light at or near one of four nominal
wavelengths. Which one of the following is not one of those nominal wavelengths?
Shorter - ✔✔Loading coils limit the frequency at which information can be
transmitted. The loading coil spacing determines the upper cutoff frequency. The
______ the spacing between loading points, the higher the cutoff frequency.
≈90m (295ft); including - ✔✔A balanced twisted-pair permanent link consists of up
to _____ of horizontal cabling, _______ a connector at each end.
Dimensions and separation of conductors - ✔✔Series inductance is related to the:
- Dimensions and separation of conductors
- Dielectric loss of the insulation and jacket materials
- Dimensions and separation of conductors and to the dielectric constant of the
insulation and jacket materials
0.75 - ✔✔The maximum recommended connection loss for optical fiber connectors is
______ dB.
- 0.05
- 0.10
- 0.30
- 0.75
Resistive - ✔✔The earlier function model of a transmission line was based on _____
loss.
- resistive
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 3
Exam 2025 Questions and Answers
100% Pass
100 Gb/s - ✔✔Multimode optical fiber is best suited for premises applications
where links are less than ≈100m (328ft) for data rates of _____ or less.
- 155 mb/s
- 1 gb/s
- 10 gb/s
- 100 gb/s
Return Loss - ✔✔For balanced twisted-pair cabling, _______ is the ratio between the
transmitted power and the reflected power expressed in dBs.
Solid - ✔✔When comparing stranded conductors to solid conductors, and advantage
of _____ conductors is less resistance.
True - ✔✔(ToF) Digital data can be transmitted noise free over essentially unlimited
distances if the digital data received and regenerated at intervals before it is
degraded by added noise.
True - ✔✔(ToF) Free space loss is the signal attenuation that would result if all
reflection, refraction, scattering, diffraction, and absorption influences were
removed.
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
,400 Gb/s - ✔✔GigE is being deployed on many optical fiber networks. Typical IEEE
recognized GigE network speeds in the MAN and WAN environment can be as high
as:
True - ✔✔(ToF) Increasing the length of an optical fiber link can result in an increase
in total signal attenuation.
780 nm - ✔✔The center wavelength of short wavelength lasers is:
False - ✔✔(ToF) Stranded conductors have better transmission performance at high
frequencies than solid conductors.
At least twice - ✔✔Analog signals can be converted into a digital signal by a multi-
step process. The Sampling rate used must be ______ the highest frequency
component of the analog signal.
DS2 - ✔✔Which of the following North American multiplexing levels has a data rate
of 6.312 Mb/s?
1.0 dB/km - ✔✔The maximum cable attenuation coefficient for single mode inside
plant optical fiber cable at a wavelength of 1383 nm is:
SDH (Synchronous Digital Hierarchy) - ✔✔Standards have been established for
optical fiber carrier transmission. The international standard is:
Short wavelength laser - ✔✔Which of the following multimode optical fiber
transmitters has a spectral width of 4 nm?
Increasing - ✔✔The transmission characteristics of conductors pairs vary with
frequency. ______ the frequency increases the speed of transmission through cable
pairs.
Carrier - ✔✔Which one of the following is not a type of modulation used in wireless
transmission?
More - ✔✔Stranded conductor cable has _____ attenuation than solid conductor
cable.
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
, 780 nm - ✔✔Optical fiber transmitters emit light at or near one of four nominal
wavelengths. Which one of the following is not one of those nominal wavelengths?
Shorter - ✔✔Loading coils limit the frequency at which information can be
transmitted. The loading coil spacing determines the upper cutoff frequency. The
______ the spacing between loading points, the higher the cutoff frequency.
≈90m (295ft); including - ✔✔A balanced twisted-pair permanent link consists of up
to _____ of horizontal cabling, _______ a connector at each end.
Dimensions and separation of conductors - ✔✔Series inductance is related to the:
- Dimensions and separation of conductors
- Dielectric loss of the insulation and jacket materials
- Dimensions and separation of conductors and to the dielectric constant of the
insulation and jacket materials
0.75 - ✔✔The maximum recommended connection loss for optical fiber connectors is
______ dB.
- 0.05
- 0.10
- 0.30
- 0.75
Resistive - ✔✔The earlier function model of a transmission line was based on _____
loss.
- resistive
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 3
