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Cisco 642-785 Exam Syllabus Topics:

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

1. Refer to the exhibit.

Which two statements are correct? (Choose two.)

A) No traffic can be matched to the REALTIME traffic class.
B) No traffic can be matched to the BULK-DATA traffic class.
C) No traffic can be matched to the VoIP traffic class.
D) The BULK-DATA traffic class is missing the match-any option in the class-map command.
E) AF11 or AF12 or AF13 marked packets will be matched to the BULK-DATA traffic class.

2. A customer with an unmanaged CE router has reported experiencing poor quality on the video conferencing and broadcast multimedia applications. To address the issue, the provider has implemented shaping on the PE router to "smooth out" speed mismatches in the network. Which of these is a valid concern with this approach?

A) In addition to shaping, the provider should implement policing so the application can detect the congestion and throttle traffic.
B) Shaping can only be applied to the outbound interface, which does not prevent the customer from flooding the inbound link to the provider.
C) Shaping should only be used in a TCP-based environment where the application can detect the congestion and adjust. Shaping provides little benefit with UDP applications.
D) While shaping may help the broadcast multimedia application, it could cause additional delay in the video conferencing application.

3. What problem could occur when applying this policy map on CE?
policy-map CE-SP-MODEL class VOIP priority class BROADCAST-VIDEO priority class SP-CRITICAL-DATA bandwidth percent 40 random-detect exp 3 15000 packets 45000 packets class class-default random-detect exp 1 2500 packets 7500 packets random-detect exp 0 1500 packets 10500 packets

A) Only one priority queue is allowed per policy.
B) All traffic is classified and treated properly, no issues occur.
C) No bandwidth or policing is configured for voice and video traffic, and other traffic could be impacted.
D) Default class does not have bandwidth assigned.

4. Refer to the exhibit.

Which statement is correct?

A) This example is a dual-bucket policer, and only traffic that exceeds the committed rate will be dropped.
B) This example is a traffic policer, and traffic exceeding the committed rate will be buffered until the congestion is cleared.
C) This example is a percentage-based policer, and the configured percentage is referenced to the input or output queue size.
D) This example is a dual-rate policer, and traffic exceeding either the peak or the committed rate will be dropped.
E) This example is a traffic policer, and three token buckets are used to meter the incoming traffic.

5. 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) CS1
B) CS3
C) AF31
D) BE
E) CS4

Solutions: