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NCTI Question and answers already passed 2023
NCTI Question and answers already passed 2023
[Meer zien]Voorbeeld 2 van de 12 pagina's
Voorbeeld 2 van de 12 pagina's
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Voorbeeld van de inhoud
NCTI - 2023 part IIWhat major sources of television programming are available to broadband cable
operators? - correct answer Over-the-air; terrestrial microwave; direct cable feed;
satellites; and local origination programming.
What are the three main elements of a broadband cable network? - correct answer
The headend; the distribution network composed of coaxial cable and/or fiber-optic
cable; the drop at the customer premises.
In a broadband cable network, what group is responsible for ensuring that the network
remains in smooth running order by dispatching crews to carry out routine system
testing, preventative maintenance, and equipment servicing and replacement? - correct
answer NOC
In a broadband cable network, which administrative group maintains communication
with installers, construction and maintenance technicians, and the customer service
departments? - correct answer Dispatch
In the United States, downstream broadband RF
Radio frequency
signals traveling inside coaxial cable begin at what frequency? - correct answer 54
MHz.
What is typically used to represent computer characters or words? - correct answer
ASCII code.
What analog TV impairments are no longer problems in digital video? - correct answer
Ghosting and snow.
What happens as RF Radio frequency signals travel over cable? - correct answer RF
signal levels decrease over distance.
What type of traffic is transported over a broadband cable network's return path? -
correct answer Voice and data traffic along with communications via STB Set-top
boxes and other monitoring devices throughout the network.
What are the factors that determine a conductor's resistance? - correct answer
Conductor material, diameter, length, and temperature.
OTA Over-the-air broadcast signals are acquired at the headend using - correct answer
Yagi and log periodic antennas.
During the 1980s, what led to the expansion in cable system channel capacity? - correct
answer Fiber-optic technology.
, Digital and analog signals are different in that - correct answer Digital networks can
combine, or multiplex, several different signals into one transmission
In the CARS
Cable antenna relay service - correct answer The over-the-air signal is converted to a
frequency in the 12.7-13.2 GHz band.
One difference between FM Frequency modulation and AML Amplitude modulated link
techniques in microwave signal transmission is that - correct answer FM transmits a
single channel, and AML sends blocks of broadband channels between headends and
hubs.
A satellite transponder - correct answer Receives, amplifies, transmits (at a different
frequency), and re-amplifies analog or compressed digital signals.
A single-beam TV receive-only (TVRO) antenna - correct answer Has a parabolic
shape that reflects the downlinked signal from all locations on the dish surface onto a
central focal point, which collects the reflections and provides maximum signal reception
What device in the headend separates an incoming signal into baseband video and
audio elements? - correct answer Demodulators.
Which of the following is occurring inside the headend? - correct answer Video signals
are amplitude modulated; audio signals are frequency modulated; and color signals are
amplitude and phase modulated.
Once signals are ready for transmission out of the headend, what is the last thing that
needs to be done to the signals? - correct answer Multiplexed.
In the tree-and-branch architecture, how is the downstream signal from the trunk fed to
the distribution branches? - correct answer Within each trunk amplifier, a portion of
the downstream is fed to a bridger amplifier to boost the signal before being split and
routed to the distribution branches.
What is a common solution when congestion from modem activity and traffic becomes
unacceptable in a HFC
Hybrid fiber/coax
network? - correct answer Node splitting, the subdividing of serving areas into two or
more smaller serving areas.
How can a less-experienced technician identify what non-standard symbols on the
network design maps represent? - correct answer The legend at the bottom of the
network design map that defines the map symbols, cable types, and amplifier data.
What technologies are defined in DOCSIS 4.0 to help sustain the HFC
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