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

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

2. What are three fundamental QoS mechanisms? (Choose three.)

A) congestion handling
B) marking
C) policing
D) congestion avoidance
E) undersubscription

3. Refer to the exhibit.

A customer reports that data between their sites across your network is very slow and that
voice and video quality are unacceptable. Packet traces of data coming in from and going out to the customer confirm that many packets are being dropped in your network, and many of those that are not dropped are being remarked to CS1. Class maps and a policy map configured as shown are applied inbound to the Fast Ethernet interfaces that connect the customer. What could be the problem?

A) The match criteria is DSCP and the customer packets are being sent marked using IP precedence.
B) The CIR and PIR values appear to have been configured using kbps when the entries are bps.
C) The customer data is being rate limited, but is not being queued by class, which is causing tail drops and packet remarking.
D) All traffic is matching the class class-default, because all other classes are match-all with multiple match criteria.

4. 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 CE is self-managed and the customer provides adequate QoS marking
C) when the customer has high bandwidth access to the network
D) when the customer will only transport delay-tolerant data

5. Which two match statements are correct in Cisco IOS Software? (Choose two.)

A) class-map match-any class3 match dscp af31 match dscp af41
B) class-map class3 match dscp af31 match dscp af41
C) class-map match-none class2 match protocol ip
D) class-map class1 match not protocol ip

Solutions: