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

1. What are two benefits of the DiffServ model? (Choose two.)

A) It does not require setting up an end-to-end signaling mechanism.
B) Service quality can be tailored to the needs of many different types of traffic.
C) It provides absolute guarantees of service quality.
D) Its class-based mechanisms are simple and scale well.

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

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

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

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

4. Refer to the exhibit.

Which statement is correct?

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

5. A customer reports that the packets from their custom TCP application, which is currently marked as DSCP AF43, is being dropped more frequently than desired. All of the links in service provider network are using DSCP-based WRED. What can be changed to best improve the drop rate of the customer's custom application without causing major problems for the other traffic classes?

A) Mark the custom application traffic to DSCP EF instead.
B) Mark the custom application traffic to DSCP AF41 instead.
C) Remove WRED on all the links.
D) Allocate more bandwidth to the AF43 traffic class.
E) Use a different queuing method for the AF43 traffic class.

Solutions: