350-021 CCIE SP Cable Qualification Exam

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Showing 4–6 of 15 questions

Question 4

Which are HFC cable television forward path networks aligned to provide? (multiple answer)

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  • For asymmetrical gain since the downstream and upstream bandwidths are also asymmetrical

  • For unity gain with a fixed input level and varying output levels adjusted by the selection of a fixed value attenuator and equalizer at the output stage in each of the forward amplifiers in the network

  • For unity gain with a fixed output level and varying input levels adjusted by the selection of a fixed value attenuator & equalizer at the input stage of each of the forward amplifiers in the network

  • It is not necessary to align the forward path amplifiers since the CMTS will automatically compensate for forward path gain discrepancies.

  • For unity gain and are level compensated by automatic gain and slope control systems utilizing RF pilot reference carriers


Question 5

What command on the Ubr7246 can help find the possibility of a problem with ingress noise on cable x/y upstream? (multiple answer)

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  • Show controller cable x/y upstream z

  • Debug cable mac log verbose

  • Debug cable modulation

  • Show cable hop

  • Show int cable x/y upstream z


Question 6

With CGMP enabled, which are unique about the following MAC address range: 01-00-5E-

00-00-00 to 01-00-5E-00-00-FF? (multiple answer)

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  • CGMP does not prune those MAC addresses.

  • They contain the CGMP Multicast addresses for the IGMP Leaves and IGMP Queries.

  • CGMP filters those MAC addresses when they arrive at the processor

  • They are the reserved IP addresses of 224.0.0.0 to 224.0.0.255 for forwarding local IP multicast traffic in a single Layer 3 hop.