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

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

2. Which Cisco IOS feature is used to enable the following class map configuration?
class-map match-all test-cm
match protocol gnutella file-transfer "*"

A) CAR
B) NBAR
C) NetFlow
D) CBWFQ
E) Flexible Packets Matching

3. Which two IP SLA Probe types can be used to measure voice quality? (Choose two.)

A) UDP Echo
B) UDP Delay
C) UDP Jitter
D) UDP MOS
E) HTTP
F) ICMP Path Jitter

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

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

5. An MPLS VPN customer with managed CE services recently made some changes to their call manager configurations. Now the customer reports that their VoIP traffic voice quality is very poor. What could be a cause of the problem?

A) The VoIP traffic is being marked as DSCP EF.
B) RTP header compression is used for the VoIP traffic class.
C) The VoIP traffic class is not being policed at the CE router egress.
D) The customer changed the codec used for voice compression from G.729 to G.711.
E) The traffic shaping rate for the VoIP traffic class is too low.

Solutions: