ROC I - Supplemental Questions Part 3
Question and answers already passed
Which layer specifies the modulation and access techniques for
communications over an HFC network? - correct answers Physical
True or False. The communications access technology that is used to divide
the upstream frequency spectrum into timeslots is called "best-effort". - correct
answers False
True or False. A requirement of PacketCable called for QoS controls,
enhanced security, and adaptive equalization in the upstream parth for
improved throughput. - correct answers True
True or False. A major change made to DOCSIS 1.0, which then became
DOCSIS 1.1 was to make DOCSIS 1.1 PacketCable compliant. - correct
answers True
True or False. Upstream data is sent from the cable modem to a tree-and-
branch architecture that is located in the headend. - correct answers False
To increase downstream and upstream data throughput, this DOCSIS version
utilizes OFDM and LDPC... - correct answers DOCSIS 3.1
CableLabs introduced channel bonding to meet the demand for higher data
throughputs and to remain competitive with FTTP network architectures in
which DOCSIS version? - correct answers DOCSIS 3.0
The maximum bandwidth of the upstream carrier channel was doubled from
3.2 to 6.4 MHz in which DOCSIS version? - correct answers DOCSIS 2.0
, True or False. DOCSIS 1.0 was designed to operate on legacy tree-and-
branch and hybrid fiber/coax (HFC) architectures. - correct answers True
True or False. In addition to being an equipment standard, DOCSIS includes
recommended parameters for hybrid fiber/coax (HFC) network performance. If
the network meets or exceeds these recommendations, operators can expect
reliable data transmission. - correct answers True
In a cable network, if traffice becomes congested because of heavy usage,
what can be added to reduce the number of customers in a service group? -
correct answers Optical Fiber Node
True or False. Quality of service (QoS) protocols introduced in DOCSIS 1.1
enabled the setting of defined levels of service so that minimum throughput
data rates could be guaranteed. - correct answers True
What is the cable loss given that the drop cable loss is 1.4 dB/100 feet at 40
MHz, and 6.1 dB/100 feet at 865 MHz, calculate the cable loss at 40 MHz. -
correct answers 2.8 dB
What is the cable loss given that the drop cable loss is 1.4 dB/100 feet at 40
MHz, and 6.1 dB/100 feet at 865 MHz, calculate the cable loss at 865 MHz. -
correct answers 12.2 dB
Why is long-loop automatic gain control (AGC) needed on the return path? -
correct answers Long-loop AGC helps ensure unity gain in the upstream
direction by adjusting the modem and STB upstream carrier levels to
compensate for different attenuation losses within the drop system.
Question and answers already passed
Which layer specifies the modulation and access techniques for
communications over an HFC network? - correct answers Physical
True or False. The communications access technology that is used to divide
the upstream frequency spectrum into timeslots is called "best-effort". - correct
answers False
True or False. A requirement of PacketCable called for QoS controls,
enhanced security, and adaptive equalization in the upstream parth for
improved throughput. - correct answers True
True or False. A major change made to DOCSIS 1.0, which then became
DOCSIS 1.1 was to make DOCSIS 1.1 PacketCable compliant. - correct
answers True
True or False. Upstream data is sent from the cable modem to a tree-and-
branch architecture that is located in the headend. - correct answers False
To increase downstream and upstream data throughput, this DOCSIS version
utilizes OFDM and LDPC... - correct answers DOCSIS 3.1
CableLabs introduced channel bonding to meet the demand for higher data
throughputs and to remain competitive with FTTP network architectures in
which DOCSIS version? - correct answers DOCSIS 3.0
The maximum bandwidth of the upstream carrier channel was doubled from
3.2 to 6.4 MHz in which DOCSIS version? - correct answers DOCSIS 2.0
, True or False. DOCSIS 1.0 was designed to operate on legacy tree-and-
branch and hybrid fiber/coax (HFC) architectures. - correct answers True
True or False. In addition to being an equipment standard, DOCSIS includes
recommended parameters for hybrid fiber/coax (HFC) network performance. If
the network meets or exceeds these recommendations, operators can expect
reliable data transmission. - correct answers True
In a cable network, if traffice becomes congested because of heavy usage,
what can be added to reduce the number of customers in a service group? -
correct answers Optical Fiber Node
True or False. Quality of service (QoS) protocols introduced in DOCSIS 1.1
enabled the setting of defined levels of service so that minimum throughput
data rates could be guaranteed. - correct answers True
What is the cable loss given that the drop cable loss is 1.4 dB/100 feet at 40
MHz, and 6.1 dB/100 feet at 865 MHz, calculate the cable loss at 40 MHz. -
correct answers 2.8 dB
What is the cable loss given that the drop cable loss is 1.4 dB/100 feet at 40
MHz, and 6.1 dB/100 feet at 865 MHz, calculate the cable loss at 865 MHz. -
correct answers 12.2 dB
Why is long-loop automatic gain control (AGC) needed on the return path? -
correct answers Long-loop AGC helps ensure unity gain in the upstream
direction by adjusting the modem and STB upstream carrier levels to
compensate for different attenuation losses within the drop system.
