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

1. Which four factors can be used for packet classification in a QoS-aware network device? (Choose four.)

A) MQC
B) destination address
C) source address
D) IP precedence
E) DSCP
F) TTL

2. Refer to the exhibit.

The service provider uses a three-class service provider QoS model (real-time, critical, best effort). The provider receives reports from a customer about poor quality on their multimedia conferences. The provider recently updated their profiles to include multimedia conferencing (af41) to their real-time class, which includes voice (ef). What are the two most likely causes of this problem? (Choose two.)

A) The SP-CRITICAL-DATA class should not use random detect for multimedia traffic.
B) The SP-REALTIME class should include mpls experimental 4, not 5.
C) The MPLS experimental 3 is in the SP-CRITICAL-DATA class, not the SP_REALTIME class.
D) Multimedia conferencing is included in the SP-CRITICAL-DATA class.
E) The class map for SP-REALTIME does not include the DSCP values for multimedia conferences and voice traffic.

3. When the customer LAN is managed by the service provider and the network is oversubscribed, what is the best location for use of congestion avoidance mechanisms?

A) in interfaces in the service provider network incoming from the customer LAN
B) in the service provider core
C) on output interfaces from the service provider network leading to the customer LAN
D) on output interfaces from the customer LAN leading into the service provider network

4. Refer to the exhibit.

A customer has commented that voice quality is not meeting expectations when calls cross your network. This voice packet was captured from the egress link to the customer. This capture is representative of the customer's voice packets across your network and the queuing method shown is representative of packet treatment across your network. How might the problem be corrected?

A) Increase the bandwidth for the voice class.
B) Set up multiple priority queues to ensure low latency for voice packets.
C) Enable WRED in the CBWFQs to minimize the possibility of dropping voice packets.
D) Ensure that voice packets are correctly marked when they traverse your network.

5. A service provider recently changed from RFC 3270 Uniform mode to Pipe mode. Which three considerations about this change are true? (Choose three.)

A) If the provider moved to a Short Pipe mode model, it would allow them to implement customer-specific QoS policy on the PE egress.
B) The Pipe mode provides the isolation between the customer and provider DiffServ domains, while maintaining a simpler support model.
C) The Short Pipe mode derives the outbound classification of the WRED and WFQ based on the DiffServ policy of the provider.
D) In Uniform mode, when the topmost EXP value is changed, the changed EXP value will propagate to the original IP precedence or DSCP.

Solutions: