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

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

2. 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) CS1
C) CS3
D) BE
E) AF31

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

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

4. Refer to the exhibit.

Which statement is correct?

A) Packets marked with both DSCP EF and MPLS EXP 5 markings will not be classified into the SP-REALTIME traffic class.
B) A total of 133836 packets have been transmitted out of the FastEthernet0/0 interface.
C) No traffic matched the SP-REALTIME class.
D) This policy map is applied to the FastEthernet0/0 interface in the input direction.
E) The FastEthernet0/0 interface is using CBWFQ egress queueing.

5. Which three items are important when monitoring service quality in the SP network? (Choose three.)

A) The typical cause of QoS issues is intermittent failure of network devices and these are inherently difficult to detect.
B) QoS issues can be difficult to detect when there is not enough traffic to trigger the configured QoS policy.
C) Establishing alarm thresholds for QoS problems can be complicated.
D) QoS support differs from device to device, depending on underlying hardware platforms and software.
E) Collection of data to detect QoS issues is slow and labor-intensive.
F) Troubleshooting class map configurations is complex and frequently required.

Solutions: