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Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) Sample Questions:

1. A MPLS VPN customer reports poor VoIP call quality across the MPLS VPN. What could be the problem?

A) The service provider is using RTP header compression on the high-speed core links.
B) The service provider has assigned more than 33% of the interface bandwidth to the priority class.
C) The service provider is using the Short Pipe mode rather than the Uniform mode.
D) All the core links in the service provider network are using LLQ.
E) The total end-to-end delay measured is constantly over 350 msec.

2. Refer to the exhibit on a PE router. What could be causing the issue?
Service-policy output: OUTPUT-POLICY Counters last updated 00:00:00 ago
Class-map: REALTIME (match-any) 845206 packets, 348763573 bytes 30 second offered rate 3000000 bps, drop rate 2500000 bps Match: ip dscp cs5 (40) ef (46) Priority: 10% (500 kbps), burst bytes 327265678, b/w exceed drops: 312925450
Class-map: DSCP-OUT-RTVI (match-any) 0 packets, 0 bytes 30 second offered rate 0000 bps, drop rate 0000 bps Match: ip dscp af41 (0) Queueing queue limit 32 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0
Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0000 bps, drop rate 0000 bps Match: any Queueing queue limit 1024 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0

A) CE marked all traffic incorrectly to DSCP 46.
B) CE marked all traffic incorrectly to DSCP 0.
C) PE interface was not configured with enough bandwidth.
D) Traffic rate CE sent is over the SLA limit.
E) PE needs to upgrade to a higher throughput interface.

3. Refer to the exhibit.

Which two statements are correct? (Choose two.)

A) No traffic can be matched to the BULK-DATA traffic class.
B) No traffic can be matched to the REALTIME traffic class.
C) AF11 or AF12 or AF13 marked packets will be matched to the BULK-DATA traffic class.
D) The BULK-DATA traffic class is missing the match-any option in the class-map command.
E) No traffic can be matched to the VoIP traffic class.

4. Refer to the exhibit. Voice quality is poor on calls placed between the two sites. What change would you

recommend to solve this problem?

A) Increase the bandwidth of the voice priority queue.
B) Set up WRED to help avoid link congestion.
C) Lower the total bandwidth allocated for the video, critical, and class-default queues, because they are starving the voice queue.
D) Change the voice class map to match DSCP EF or CS5.

5. Which Cisco IOS command will show a summary of probes?

A) show ip sla responder
B) show ip sla configuration
C) show ip sla statistics
D) show ip sla monitors

Solutions: