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

1. Refer to the exhibit.

Which two statements are correct? (Choose two.)

A) The gold class is configured with the bandwidth 100 command.
B) The voice class is configured with the police 128 command.
C) The gold class is configured with the priority 100 command.
D) The voice class is configured with the priority 128 command.
E) The class-default class is configured with the fair-queue command.
F) The voice class is configured with the bandwidth 128 command.

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

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

3. Which statement about when you mix TCP and UDP traffic in the same class and overflow occurs is true?

A) UDP traffic suffers more, because TCP guarantees delivery.
B) TCP traffic is starved, because UDP never slows down when packets get dropped.
C) Mixing TCP and UDP in the same class is not supported.
D) The overflow is not a problem, because both TCP and UDP packets get randomly dropped and traffic will back out.

4. A customer is experiencing poor quality on voice connections coming from a particular branch office. Data on the service provider network capacity indicates that the devices serving that location are heavily oversubscribed. It will be months before planned expansions can be implemented. Which class-based traffic-shaping technique would be appropriate to consider implementing?

A) shaping to the peak rate
B) shaping to the observed median rate
C) shaping to the committed rate
D) shaping to the configured average rate

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

Solutions: