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NCTI -HSD FINAL-DOJ 2 EXAM NEWEST
ACTUAL EXAM COMPLETE 100
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
The first version of the Data Over Cable Service Interface Specification
(DOCSIS) was approved as an international standard by what organization?
- CORRECT ANSWER✔✔ The International Telecommunication Union (ITU).
What criteria does the Data Over Cable Service Interface Specification
(DOCSIS) certification process ensure? - CORRECT ANSWER✔✔ Compliance
with the DOCSIS standard and interoperability between suppliers.
What layers of the Open Systems Interconnection (OSI) reference model
are applied between Data Over Cable Service Interface Specification
(DOCSIS) modems and the cable modem termination system (CMTS)? -
CORRECT
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ANSWER✔✔ Layers 1 through 4 (Physical layer, Data Link Layer, Network
Layer, and Transport Layer) are applied between the DOCSIS modem and
CMTS.
What access technology does the first version of the Data Over Cable
Service Interface Specification (DOCSIS 1.0) use to send data upstream over
the network's RF return path? - CORRECT ANSWER✔✔ Time division
multiple access (TDMA).
What was added to the first Data Over Cable Service Interface Specification
(DOCSIS) that enabled broadband cable operators to provide telephone
service with quality and reliability that rivaled the products of the
traditional telephone companies? - CORRECT ANSWER✔✔ Quality of
service (QoS) controls, enhanced security, and adaptive equalization in the
upstream path.
What features were introduced with the 3.1 version of the Data Over Cable
Service Interface Specification (DOCSIS 3.1) to increase the downstream
and upstream data throughput? - CORRECT ANSWER✔✔ Orthogonal
frequency division multiplexing (OFDM) and low-density parity-check
(LDPC).
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Which Data Over Cable Service Interface Specification (DOCSIS) version was
the first to provide an option for raising the top frequency of the upstream
spectrum to 85 MHz in order to create enough bandwidth for upstream
carriers from modems running on previous DOCSIS versions? - CORRECT
ANSWER✔✔ DOCSIS 3.0.
Why are the data throughput rates for both downstream and upstream in
Data Over Cable Service Interface Specification (DOCSIS) networks
asymmetrical? - CORRECT ANSWER✔✔ Because the narrower bandwidths
and lower orders of modulation for the return path carriers cause the
DOCSIS downstream and upstream data rates to be unequal or
asymmetrical.
Which Open Systems Interconnection (OSI) reference model layers does the
MAC Layer in the Data Over Cable Service Interface Specification (DOCSIS)
overlap? - CORRECT ANSWER✔✔ The Physical and Data Link Layers.
From where do Data Over Cable Service Interface Specification (DOCSIS)
modems receive their configuration files, billing system messages, and
NCTI -HSD FINAL-DOJ 2 EXAM NEWEST
ACTUAL EXAM COMPLETE 100
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
The first version of the Data Over Cable Service Interface Specification
(DOCSIS) was approved as an international standard by what organization?
- CORRECT ANSWER✔✔ The International Telecommunication Union (ITU).
What criteria does the Data Over Cable Service Interface Specification
(DOCSIS) certification process ensure? - CORRECT ANSWER✔✔ Compliance
with the DOCSIS standard and interoperability between suppliers.
What layers of the Open Systems Interconnection (OSI) reference model
are applied between Data Over Cable Service Interface Specification
(DOCSIS) modems and the cable modem termination system (CMTS)? -
CORRECT
,2 | Page
ANSWER✔✔ Layers 1 through 4 (Physical layer, Data Link Layer, Network
Layer, and Transport Layer) are applied between the DOCSIS modem and
CMTS.
What access technology does the first version of the Data Over Cable
Service Interface Specification (DOCSIS 1.0) use to send data upstream over
the network's RF return path? - CORRECT ANSWER✔✔ Time division
multiple access (TDMA).
What was added to the first Data Over Cable Service Interface Specification
(DOCSIS) that enabled broadband cable operators to provide telephone
service with quality and reliability that rivaled the products of the
traditional telephone companies? - CORRECT ANSWER✔✔ Quality of
service (QoS) controls, enhanced security, and adaptive equalization in the
upstream path.
What features were introduced with the 3.1 version of the Data Over Cable
Service Interface Specification (DOCSIS 3.1) to increase the downstream
and upstream data throughput? - CORRECT ANSWER✔✔ Orthogonal
frequency division multiplexing (OFDM) and low-density parity-check
(LDPC).
, 3 | Page
Which Data Over Cable Service Interface Specification (DOCSIS) version was
the first to provide an option for raising the top frequency of the upstream
spectrum to 85 MHz in order to create enough bandwidth for upstream
carriers from modems running on previous DOCSIS versions? - CORRECT
ANSWER✔✔ DOCSIS 3.0.
Why are the data throughput rates for both downstream and upstream in
Data Over Cable Service Interface Specification (DOCSIS) networks
asymmetrical? - CORRECT ANSWER✔✔ Because the narrower bandwidths
and lower orders of modulation for the return path carriers cause the
DOCSIS downstream and upstream data rates to be unequal or
asymmetrical.
Which Open Systems Interconnection (OSI) reference model layers does the
MAC Layer in the Data Over Cable Service Interface Specification (DOCSIS)
overlap? - CORRECT ANSWER✔✔ The Physical and Data Link Layers.
From where do Data Over Cable Service Interface Specification (DOCSIS)
modems receive their configuration files, billing system messages, and
