NCTI – HSD Questions and Answers 100%
Correct
which of the following mitigation devices provide filtering on sub split return frequencies as
described? Correct Ans-window filters act on specific frequencies from 5-42 Mhz
what is a common solution to signal reflections where tap values are less than 17 db? Correct
Ans-installing high pass filters on all unused tap ports
the first version of docsis was approved as an international standard by what
organization? Correct Ans-international telecommunication union (ITU)
What criteria does the docsis certification process ensure? Correct Ans-compliance with the
docsis standard and interchangeability between suppliers
what layers of the OSI model are applied between docsis and the CMTS Correct Ans-layers 1-
4, physical, data link, network, and transport
, what access technology does the first version of docsis 1.0 use to send data upstream over the
networks RF return path? Correct Ans-time division multiple access (TDMA)
what was added to the first docsis that enabled a broadband cable operators to provide telephone
service with quality and reliability that rivaled the products of the traditional telephone
companies Correct Ans-QoS controls, enhanced security, and adaptive equalization in the
upstream path
what features were introduced with docsis 3.1 to increase the downstream and upstream data
throughput? Correct Ans-orthogonal frequency division multiplexing (OFDM) and low
density parity check (LDPC)
what docsis specification 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 carries from
modems running on previous versions? Correct Ans-docsis 3.0
why are the data throughput rates for both downstream and upstream in docsis networks
asymmetrical? Correct Ans-because the narrower bandwidths and lower orders of modulation
for the return path carries cause the docsis downstream and upstream data rates to be unequal or
aysmmetrical
Correct
which of the following mitigation devices provide filtering on sub split return frequencies as
described? Correct Ans-window filters act on specific frequencies from 5-42 Mhz
what is a common solution to signal reflections where tap values are less than 17 db? Correct
Ans-installing high pass filters on all unused tap ports
the first version of docsis was approved as an international standard by what
organization? Correct Ans-international telecommunication union (ITU)
What criteria does the docsis certification process ensure? Correct Ans-compliance with the
docsis standard and interchangeability between suppliers
what layers of the OSI model are applied between docsis and the CMTS Correct Ans-layers 1-
4, physical, data link, network, and transport
, what access technology does the first version of docsis 1.0 use to send data upstream over the
networks RF return path? Correct Ans-time division multiple access (TDMA)
what was added to the first docsis that enabled a broadband cable operators to provide telephone
service with quality and reliability that rivaled the products of the traditional telephone
companies Correct Ans-QoS controls, enhanced security, and adaptive equalization in the
upstream path
what features were introduced with docsis 3.1 to increase the downstream and upstream data
throughput? Correct Ans-orthogonal frequency division multiplexing (OFDM) and low
density parity check (LDPC)
what docsis specification 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 carries from
modems running on previous versions? Correct Ans-docsis 3.0
why are the data throughput rates for both downstream and upstream in docsis networks
asymmetrical? Correct Ans-because the narrower bandwidths and lower orders of modulation
for the return path carries cause the docsis downstream and upstream data rates to be unequal or
aysmmetrical
