ROC II, Course I, Lesson 12 Question
and answers verified to passed
When the DOCSIS modem identifies the DOCSIS channel, the DOCSIS
modem is able to synchronize with the CMTS to achieve synchronization of
the __________ symbol timing. - correct answers quadrature amplitude
modulation (QAM) channel
During the initial maintenance interval, the DOCSIS modem sends an
insertion packet called a(n) __________ to the CMTS using a service
identifier (SID) parameter of zero. - correct answers initial ranging request
(INT-RNG-REQ)
The CMTS broadcasts a new __________ and bandwidth allocation message
(MAP) to alert the modem to a new timing interval in which to send data. -
correct answers upstream channel descriptor (UCD)
What is a DOCSIS modem looking for in a downstream carrier to synchronize
to the CMTS? - correct answers QAM carrier that has QAM symbol timing,
FEC framing, MPEG packetization, and SYNC downstream MAC messages
When scanning an OFDM channel, what does the DOCSIS 3.1 modem seek
to acquire and maintain synchronization with the CMTS on that downstream
OFDM channel? - correct answers an OFDM subcarrier
True or False. The cable modem termination system (CMTS), used as a proxy
that forwards the cable modem's request for specific provisioning data to the
appropriate server, reduces the importance of the CMTS in a DOCSIS
network. - correct answers False
, True or False. The IP address establishes the cable modem's identity for
receiving the downstream data addressed to it and for transmitting data from a
known Internet address. - correct answers True
True or False. If a cable modem is unable to establish time-of-day (ToD)
before registration, the cable modem can proceed to an operational state and
periodically retry, issuing at least one time-of-day request per 5 minutes for
each server specified until local time is established. - correct answers True
True or False. The protocol used to download configuration files to DOCSIS
modems is the transmission control protocol (TCP). - correct answers False
True or False. During the cable modem's registration, the transmit channel
configuration (TCC) encodings tell the DOCSIS 3.0 modem which upstream
frequencies to use and the transmit power range. - correct answers True
How are Internet protocol (IP) and modem configuration information sent to a
DOCSIS modem? - correct answers originates with a provisioning server and
is sent to the DOCSIS modem through the CMTS in a proxy arrangement
What sends a signal that it is ready for registration by returning specific
content in its configuration file to the CMTS? - correct answers DOCSIS
modem
What validates the configuration file content from the DOCSIS modem? -
correct answers CMTS
Where does the CMTS forward the request for a current configuration file? -
correct answers to the Configuration File Manager and DHCP server
and answers verified to passed
When the DOCSIS modem identifies the DOCSIS channel, the DOCSIS
modem is able to synchronize with the CMTS to achieve synchronization of
the __________ symbol timing. - correct answers quadrature amplitude
modulation (QAM) channel
During the initial maintenance interval, the DOCSIS modem sends an
insertion packet called a(n) __________ to the CMTS using a service
identifier (SID) parameter of zero. - correct answers initial ranging request
(INT-RNG-REQ)
The CMTS broadcasts a new __________ and bandwidth allocation message
(MAP) to alert the modem to a new timing interval in which to send data. -
correct answers upstream channel descriptor (UCD)
What is a DOCSIS modem looking for in a downstream carrier to synchronize
to the CMTS? - correct answers QAM carrier that has QAM symbol timing,
FEC framing, MPEG packetization, and SYNC downstream MAC messages
When scanning an OFDM channel, what does the DOCSIS 3.1 modem seek
to acquire and maintain synchronization with the CMTS on that downstream
OFDM channel? - correct answers an OFDM subcarrier
True or False. The cable modem termination system (CMTS), used as a proxy
that forwards the cable modem's request for specific provisioning data to the
appropriate server, reduces the importance of the CMTS in a DOCSIS
network. - correct answers False
, True or False. The IP address establishes the cable modem's identity for
receiving the downstream data addressed to it and for transmitting data from a
known Internet address. - correct answers True
True or False. If a cable modem is unable to establish time-of-day (ToD)
before registration, the cable modem can proceed to an operational state and
periodically retry, issuing at least one time-of-day request per 5 minutes for
each server specified until local time is established. - correct answers True
True or False. The protocol used to download configuration files to DOCSIS
modems is the transmission control protocol (TCP). - correct answers False
True or False. During the cable modem's registration, the transmit channel
configuration (TCC) encodings tell the DOCSIS 3.0 modem which upstream
frequencies to use and the transmit power range. - correct answers True
How are Internet protocol (IP) and modem configuration information sent to a
DOCSIS modem? - correct answers originates with a provisioning server and
is sent to the DOCSIS modem through the CMTS in a proxy arrangement
What sends a signal that it is ready for registration by returning specific
content in its configuration file to the CMTS? - correct answers DOCSIS
modem
What validates the configuration file content from the DOCSIS modem? -
correct answers CMTS
Where does the CMTS forward the request for a current configuration file? -
correct answers to the Configuration File Manager and DHCP server
