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.
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.
