Broadband digital installer Quiz 2023 Answered Correctly
What functionality is integrated in all modern signal level meters (SLM) to
measure specific parameters of a digital modulation carrier containing digital
television (DTV) and Data Over Cable Service Interface Specification (DOCSIS)
signals?
Digital signal analyzer functionality.
What is a risk of performing automated measurements on a sample of channels
instead of all channels?
Problems in unmeasured channels may go undetected.
Using a digital signal analyzer, what measurements are typically taken to
troubleshoot and diagnose a digital television (DTV) signal?
Carrier average power level, modulation error ratio (MER), and bit error ratio (BER).
How do cable operators ensure that only paying customers are receiving digital
television (DTV) service?
Cable operators prevent unauthorized reception of DTV services by scrambling or
encrypting the services.
Why were digital terminal adapters (DTA) originally installed in the customer
premises?
Because the customer wanted service to their analog TV and subscribed to basic-only
service.
What determines the amount of content that can be stored on a digital video
recorder (DVR)?
The hard drive capacity and the format of the stored content.
A cable gateway can replace which broadband cable operator supplied devices?
The cable gateway could replace a cable modem.
What forced customers to choose between the integrated entertainment system
furniture cabinet and upgraded system components?
Advances in technology, such as color television, upgraded turntables, etc.
What functionality do many Blu-ray players have, besides playing back discs?
Many Blu-ray players have built-in media streaming capabilities through a wired or
wireless network connection.
Entertainment cabinets with doors made of green glass block which of the
following from electronic components?
Infrared (IR) remote sensors.
The first version of the Data Over Cable Service Interface Specification (DOCSIS)
was approved as an international standard by what organization?
The International Telecommunication Union (ITU).
What criteria does the Data Over Cable Service Interface Specification (DOCSIS)
certification process ensure?
Compliance with the DOCSIS standard and interoperability between suppliers.
Which layers of the Open Systems Interconnection (OSI) reference model are
specific to cable networks and are present only between Data Over Cable Service
Interface Specification (DOCSIS) modems and the cable modem termination
system (CMTS)?
, Layers 1 through 4 (Physical Layer, Data Link Layer, Network Layer, and Transport
Layer) are applied between the DOCSIS modem and CMTS.
What communications 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 radio frequency (RF) return path?
Time division multiple access (TDMA).
What requirements were needed for PacketCable to deliver a quality and reliable
telephone service over a Data Over Cable Service Interface Specification
(DOCSIS) access network?
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?
Orthogonal frequency division multiplexing (OFDM) and low-density parity-check
(LDPC).
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 megahertz (MHz) in order to create enough bandwidth for upstream carriers
from modems running on previous DOCSIS versions?
DOCSIS 3.0.
Why are the data throughput rates for both downstream and upstream in Data
Over Cable Service Interface Specification (DOCSIS) networks asymmetrical?
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
Media Access Control (MAC) Layer in the Data Over Cable Service Interface
Specification (DOCSIS) overlap so that the media access control (MAC) can be
used by the cable modem termination system (CMTS) to differentiate between
cable modems?
The Physical and Data Link Layers.
Where do Data Over Cable Service Interface Specification (DOCSIS) modems
receive their configuration files, billing system messages, and access control
messages from?
From the cable modem termination system (CMTS), which interfaces with the
operations support system (OSS) and acts as a proxy or messenger that transfers
messages and files between the modems and the respective servers.
What messages must a cable modem receive from the downstream signal in
order to begin a transmitting relationship with the cable modem termination
system (CMTS)?
An upstream channel descriptor (UCD) message, a symbol timing message (SYNC),
and a bandwidth allocation message (MAP).
What instructions might a cable modem termination system (CMTS) send in a
ranging response (RNG-RSP) message to modify the cable modem's
transmission parameters?
What functionality is integrated in all modern signal level meters (SLM) to
measure specific parameters of a digital modulation carrier containing digital
television (DTV) and Data Over Cable Service Interface Specification (DOCSIS)
signals?
Digital signal analyzer functionality.
What is a risk of performing automated measurements on a sample of channels
instead of all channels?
Problems in unmeasured channels may go undetected.
Using a digital signal analyzer, what measurements are typically taken to
troubleshoot and diagnose a digital television (DTV) signal?
Carrier average power level, modulation error ratio (MER), and bit error ratio (BER).
How do cable operators ensure that only paying customers are receiving digital
television (DTV) service?
Cable operators prevent unauthorized reception of DTV services by scrambling or
encrypting the services.
Why were digital terminal adapters (DTA) originally installed in the customer
premises?
Because the customer wanted service to their analog TV and subscribed to basic-only
service.
What determines the amount of content that can be stored on a digital video
recorder (DVR)?
The hard drive capacity and the format of the stored content.
A cable gateway can replace which broadband cable operator supplied devices?
The cable gateway could replace a cable modem.
What forced customers to choose between the integrated entertainment system
furniture cabinet and upgraded system components?
Advances in technology, such as color television, upgraded turntables, etc.
What functionality do many Blu-ray players have, besides playing back discs?
Many Blu-ray players have built-in media streaming capabilities through a wired or
wireless network connection.
Entertainment cabinets with doors made of green glass block which of the
following from electronic components?
Infrared (IR) remote sensors.
The first version of the Data Over Cable Service Interface Specification (DOCSIS)
was approved as an international standard by what organization?
The International Telecommunication Union (ITU).
What criteria does the Data Over Cable Service Interface Specification (DOCSIS)
certification process ensure?
Compliance with the DOCSIS standard and interoperability between suppliers.
Which layers of the Open Systems Interconnection (OSI) reference model are
specific to cable networks and are present only between Data Over Cable Service
Interface Specification (DOCSIS) modems and the cable modem termination
system (CMTS)?
, Layers 1 through 4 (Physical Layer, Data Link Layer, Network Layer, and Transport
Layer) are applied between the DOCSIS modem and CMTS.
What communications 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 radio frequency (RF) return path?
Time division multiple access (TDMA).
What requirements were needed for PacketCable to deliver a quality and reliable
telephone service over a Data Over Cable Service Interface Specification
(DOCSIS) access network?
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?
Orthogonal frequency division multiplexing (OFDM) and low-density parity-check
(LDPC).
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 megahertz (MHz) in order to create enough bandwidth for upstream carriers
from modems running on previous DOCSIS versions?
DOCSIS 3.0.
Why are the data throughput rates for both downstream and upstream in Data
Over Cable Service Interface Specification (DOCSIS) networks asymmetrical?
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
Media Access Control (MAC) Layer in the Data Over Cable Service Interface
Specification (DOCSIS) overlap so that the media access control (MAC) can be
used by the cable modem termination system (CMTS) to differentiate between
cable modems?
The Physical and Data Link Layers.
Where do Data Over Cable Service Interface Specification (DOCSIS) modems
receive their configuration files, billing system messages, and access control
messages from?
From the cable modem termination system (CMTS), which interfaces with the
operations support system (OSS) and acts as a proxy or messenger that transfers
messages and files between the modems and the respective servers.
What messages must a cable modem receive from the downstream signal in
order to begin a transmitting relationship with the cable modem termination
system (CMTS)?
An upstream channel descriptor (UCD) message, a symbol timing message (SYNC),
and a bandwidth allocation message (MAP).
What instructions might a cable modem termination system (CMTS) send in a
ranging response (RNG-RSP) message to modify the cable modem's
transmission parameters?
