CCIE Written, Service Provider: DSL : 350-022 Exam
Exam Number/Code: 350-022
Exam Name: CCIE Written, Service Provider: DSL
“CCIE Written, Service Provider: DSL”, also known as 350-022 exam, is a Cisco certification.
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QUESTION 27:
Exhibit
You work as a network technician at Certkiller .com. A DSL customer has subscribed to a
service that provides 2 mbps downstream and 256 kbps upstream. The cable length is 10
kft (3 km). The customer reports that file transfers on the DSL line seem slower than
normal in recent days. After viewing the DSL profile parameters for the DSL port, and the
actual status of the line, what is the possible reason why the subscriber’s data rates are
slower than usual?
A. The signal-to-noise margin on the line will not allow downstream DSL rates faster than 640
kbps. If the subscriber’s service was in fact faster at some time, then something has changed in
the line characteristics or noise spectrum.
B. The subscriber is provisioned for 640 kbps downstream, and the service appears to be
working normally. The problem is apparently not related to the DSL (physical layer) part of the
service
C. The service is running in G:DMT, and 640 kbps is normal for the subscriber’s cable length.
Change the mode to ANSI T1.413 for faster rates.
D. The DSL profile is set for 16 milliseconds interleave delay. Change the interleave delay to 0,
or change the profile to fasthpath for faster line rates
Answer: A
QUESTION 28:
You work as a network technician at Certkiller .com. A subscriber complains that his DSL
rates are slower than the service he ordered. The customer ordered ADSL at 1 mbps
downstream and 256 kbps upstream, but the maximum bitrate observed during file
downloads is 100 kbps downstream.
Of the following four choices, which is clearly the most appropriate information needed to
begin troubleshooting the problem?
A. The software version running in the DSLAM.
B. The FEC parameters for the subscriber’s ADSL port in the DSLAM
C. The actual DSL rate rate that is reported when the DSL line is trained
D. The manufacturer and model of ADSL CPE that is used
Answer: C
QUESTION 29:
Your boss at Certkiller .com is curios about DSL. What best describes RADSL?
A. The DSL line trains at the highest rate possible, limited mainly by line conditions and
provisioning options.
B. The DSL line rate (bandwidth) is automatically increased when data queues are filled to a
predetermined threshold.
C. The DSL line rate remains constant while noise margins are automatically adjusted.
D. The DSL modems detect the presence of CAP, DMT, SDSL, or G.SHDSL modulation at the
receiver input and automatically select the appropriate mode to transmit.
Answer: A
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