Cisco CCIE Service Provider Cable Recertification Set 1

1.

A router is set to boot from flash, but cannot find boot commands in the configuration. Also, valid files do not exist in the default flash device. The router will:

Boot from ROM, since there are no valid sources Try to boot from the network, using a default filename Terminate the boot process with an error message Try to boot from the network, then boot from ROM as a backup

2.

A network administrator is using debug commands to check the performance of a network. What steps can the administrator take to ensure that the "debug" will not require too much CPU, or at least that she will not have to reboot the router to disable debug? (multiple answer)

Make the debug command as specific as possible Use the max-time parameter of the debug command In configuration mode, enter scheduler interval 15 Configure a loopback to channel debug traffic

3.

If there are two different headends with two different frequencies available sharing the same plant, what frequency will the two groups of cable modems, which are brand new, and have never been on-line, lock on?

They will lock on the frequency configured on the linecard. They will lock on the frequency configured on the upconverter. They will lock on the first frequency they find. They will lock on the lowest frequency. They will lock on the last frequency remembered in ram.

4.

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

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 valueattenuator 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 valueattenuator & 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 forforward path gain discrepancies. For unity gain and are level compensated by automatic gain and slope control systems utilizing RF pilotreference carriers

5.

HFC cable television return path networks are aligned to provide: (multiple answer)

Asymmetrical gain since the downstream and upstream bandwidths are also asymmetrical Unity gain with a fixed input level and varying output levels adjusted by the selection of a fixed valueattenuator and equalizer at the output stage in each of the return amplifiers in the network Unity gain with a fixed output level and varying input levels adjusted by the selection of a fixed valueattenuator and equalizer at the input stage of each of the return amplifiers in the network Cable modems the ability to power range comfortably within their output power dynamic range It is not necessary to align the return path amplifiers since the CMTS will automatically adjust the cablemodem transmit power levels.

6.

Given a PAL HFC and 8 MHz channel lineup in the downstream, is it possible to utilize 6 MHz DOCSIS cable modems and signals on the network?

No, only 8 MHz channel spacing is available for Downstream data signals Yes, as long as the 6 MHz DOCSIS signal is within a valid 8 MHz channel Yes, as long as the DOCSIS signal is upconverted through a PAL upconverter No, DOCSIS cannot be mixed with EuroDOCSIS in the Donwstream DOCSIS must be used only in an EIA-542 channel plans

7.

In a cable HFC plant, which devices are modulators? (multiple answer)

CMTS line card Upconverter Diplex filter Set top box Fiber node

8.

Unity gain is being used for alignment. The first amplifier from the node has 25 dB of gain and is 2000 feet away with cable loss of 1 dB per 100 feet. The node has an output of 35 dBmV at 55.25 MHz. What is the input at the amplifier?

13dBmV 3dBmV 15dBmV 27dBmV

9.

There are two different headends with two different frequencies available sharing the same plant. There is a - 10dB cable loss to the second active in the cascade. What is the required pad for balancing

A 5 pad A 1 pad A 2 pad A 3 pad A 4 pad

10.

A DOCSIS 2-way data system is being designedto limit upstream traffic. Unknown modems should be kept from using precious Upstream bandwidth. Given these requirements, it should beensured that the DOCSIS configuration file has what set?

Vendor-specific information field Max-cpe should be set to 1 CMTS authentication field should be set Network Access should be set to 0 Downstream frequency should be set above 450 MHz

Cisco CCIE Service Provider Cable Recertification Set 1

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Cisco CCIE Service Provider Cable Recertification Set 1

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