Cisco 642-785 : Maintaining Cisco Service Provider Quality of Service (MSPQS)

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Cisco 642-785 Exam Syllabus Topics:

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

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

2. When is a best-effort QoS policy most appropriate?

A) when the customer has high bandwidth access to the network
B) when the CE is self-managed and the customer provides adequate QoS marking
C) when the customer will only transport delay-tolerant data
D) when the customer plans to transport data from no more than one multimedia application

3. A customer reports drops for traffic in the BIZ-CRITICAL class. As part of the verification process you identify that there is a high number of random drops. Which of these can help address this problem?

A) Decrease the queue limit for the traffic class.
B) Increase the WRED min threshold value for the traffic class.
C) Enable fair queuing for the BIZ-CRITICAL class.
D) Decrease the WRED drop probability denominator for the class.

4. Refer to the exhibit.

A customer's policy profile was updated to increase the minimum bandwidth to 256 kb/s for mission critical data, but reports indicate that the policy now has an error. What change should be made to the policy to correct this error?

A) Use the shape peak command instead of the shape average command.
B) Increase the maximum queue size to 128 to compensate for the mission critical data.
C) The priority command should have been used, not the bandwidth command.
D) The bandwidth statement should read 256000.
E) Set the shape rate to a CIR that is higher than 256 kb/s.

5. Which statement about the MQC configuration shown here for the class-default traffic class is true?
policy-map CE-EDGE-4CLASS-OC3-POS-1
class class-default
bandwidth percent 25
!

A) The class-default class will use WFQ instead of FIFO queueing.
B) The bandwidth percent is referenced to the reserved bandwidth on the interface.
C) The maximum number of packets the queue for the class-default class can hold is 64 packets using the default queue-limit.
D) This configuration is invalid, because the class-default traffic class does not support the bandwidth command.

Solutions: