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

1. When the RFC 3270 Pipe mode is used, the PHB at the egress router is based on which of these?

A) The MPLS VPN label EXP value.
B) The topmost MPLS label EXP value.
C) The Differentiated Services field value in the IP packet header.
D) The packet is re-evaluated, remarked, and the PHB is based on this new marking.

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

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

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

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

Solutions: