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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) Increase the bandwidth of the voice priority queue.
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.

2. Refer to the exhibit.

Which two statements are correct? (Choose two.)

A) The traffic class cust2 is ensured a bandwidth of 51.2 kb/s.
B) This example queues the traffic into different CBWFQ classes before the aggregate traffic is shaped.
C) The policy map cust-policy specifies an average traffic shaping rate of 384 kb/s for the cust1 class and assigns the service policy cust1-classes to the cust1 class.
D) This example is a hierarchical MQC example, and the cust-policy is the child policy.
E) Within the cust1-classes policy, the gold class is guaranteed 50 percent of the bandwidth. Silver is guaranteed 20 percent of the bandwidth, and bronze is guaranteed 15 percent of the bandwidth.
F) Within the cust2-classes policy, the gold class is guaranteed 30 percent of the S3/2 interface bandwidth. Silver is guaranteed 15 percent of the S3/2 interface bandwidth. Bronze is guaranteed 10 percent of the S3/2 interface bandwidth.

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

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

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

5. A customer reports that the packets from their custom TCP application, which is currently marked as DSCP AF43, is being dropped more frequently than desired. All of the links in service provider network are using DSCP-based WRED. What can be changed to best improve the drop rate of the customer's custom application without causing major problems for the other traffic classes?

A) Remove WRED on all the links.
B) Mark the custom application traffic to DSCP AF41 instead.
C) Allocate more bandwidth to the AF43 traffic class.
D) Mark the custom application traffic to DSCP EF instead.
E) Use a different queuing method for the AF43 traffic class.

Solutions: