NCTI - Cable Network Overview Conventional Final Exam Study Guide
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NCTI
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NCTI
NCTI - Cable Network Overview
Conventional Final Exam Study Guide
List the six methods by which signals arrive at the cable system headend. - answerDirect
feed, coaxial cable, fiber-optic cable, over-the-air, PSTN, and CMTS.
What group established the data-over-cable-service-interface-specifica...
NCTI - Cable Network Overview
Conventional Final Exam Study Guide
List the six methods by which signals arrive at the cable system headend. - answer✔✔Direct
feed, coaxial cable, fiber-optic cable, over-the-air, PSTN, and CMTS.
What group established the data-over-cable-service-interface-specification (DOCSIS)? -
answer✔✔CableLabs.
What provides the cable network's interface to the Internet? - answer✔✔The cable modem
termination system (CMTS).
In terms of bandwidth, how wide is a video signal in a U.S. cable system? - answer✔✔6 MHz.
The process of combining digital services in the headend is called: - answer✔✔Multiplexing.
Many of the potential drawbacks from early coaxial tree-and-branch distribution can be
overcome by - answer✔✔Utilizing an HFC or PON architecture.
What is the function of an optical node? - answer✔✔It converts light energy to RF.
How often does the Federal Communications Commission (FCC) require cable operators to
perform proof-of-performance (POP) measurements on the signals in the headend and at
specified test locations throughout the network? - answer✔✔Bi-annually.
Which of the following best describes basic service provided by the cable company? -
answer✔✔Local origination channels.
When delivering high-speed Internet service, the cable modem tunes to the downstream carrier
and communicates with which of the following? - answer✔✔The cable modem termination
system (CMTS).
Before fiber or coax is placed in an aerial plant, steel-support strand is strung, suspended, and
attached to a clamp. Where should this strand be placed in relation to telephone cables and utility
power lines? - answer✔✔At least 40 in. below power lines and 12 in. above telephone cables.
Which type of power supply experiences a slight time delay before switching over to batteries
during a utility power outage? - answer✔✔Standby.
How do amplifiers maintain equal signal levels? - answer✔✔By boosting incoming signal levels
to match the output levels established at the amplifier from the headend.
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