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

1. You work for service provider that employs a four-class service provider QoS model (best effort, bronze, silver, gold). A customer recently reported an issue with high drop rate on a mission-critical database application in the silver class. The silver class is currently at capacity. The gold class is currently only used for voice and video conferencing, and has available bandwidth. The application was remapped to the gold class. Which statements are valid alternative options to this decision? (Choose two.)

A) The provider should consider moving to a six-class QoS model to provide more available classes of service to differentiate traffic.
B) In addition to the remapping, the provider would have to change the queue model from WFQ to priority queued.
C) Moving to a three-class QoS model would allow for more bandwidth per class and would reduce the support of maintaining multiple classes.
D) Additional bandwidth should have been added to the silver class from one of the lower classes before the traffic class was moved.

2. Refer to the exhibit.

The QoS profile was recently updated to mark VoIP traffic with a DSCP setting of AF41. However, the traffic going to the phones in the 172.19.5.0/24 address space is not being marked properly. What is causing this problem?

A) The access list does not properly identify SIP traffic.
B) The VoIP classification should be configured before any other classifications, because it is the highest priority.
C) Class typeA markings appear first in the policy map, which causes this marking to be applied.
D) The traffic policy is not written correctly, which causes the wrong marking to be applied.

3. Which statement about the rates and statistics (such as match, transmit, drop, and police) shown in the show policy-map interface output is true?

A) The traffic policing statistics are displayed in real time.
B) The matched statistics of the packet are displayed in real time.
C) The rates are displayed in real time, which matches the actual traffic rate.
D) The matched statistics of the packet can be cleared only when the router reboots.
E) The rates are computed as a moving average of instantaneous rates.

4. Refer to the exhibit.

You have implemented RFC 3270 Pipe mode in your MPLS network. A customer packet with the DSCP value of AF31 has been sent to the ingress PE router. The PE router has set the MPLS experimental bits per policy, but the policer has remarked the experimental bits of the top label. What will the DSCP value of the packet be when it leaves the egress PE router?

A) CS4
B) BE
C) CS1
D) AF31
E) CS3

5. Refer to the exhibit.

A service provider moved from a three-class service provider QoS model to a four-class service provider QoS model. A new class of service called CRITICAL-B was created to support traffic with a DSCP marking of AF31. A customer reports that the traffic in the CRITICAL-B class is having problems. What step should the service provider take to correct this issue?

A) The CRITICAL-A class should change from match-all to match-any.
B) The class map for CRITICAL-B should have a DSCP value of 28.
C) The max-reserved-bandwidth command must be used to allocate more bandwidth than allowed by default.
D) The policy map should be updated to move the BULK class to the bottom of the policy.

Solutions: