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

1. A customer reports that during peak hours, FTP performance is unacceptable. Currently, the service provider maps the customer FTP traffic into the class-default traffic class and FTP traffic is marked with MPLS EXP1. The class-default class traffic is configured with MPLS EXP based WRED and also with the bandwidth command. What could be causing the FTP performance issues with the customer?

A) The FTP-type bulk traffic should be mapped to MPLS EXP 5 instead of MPLS EXP 1. The improper marking of FTP packets is causing CBWFQ to assign lower priority for FTP packets within the class-default traffic class.
B) FTP packets are being more randomly dropped that the other TCP traffic within the class-default traffic class, because the WRED thresholds for MPLS EXP 3 marked packets were configured to improper values.
C) The service provider is using LLQ on all the core links, but the FTP traffic is not is assigned to the priority queue.
D) The bandwidth command is causing the FTP issues. It is generally not recommended to use CBWFQ for the class-default traffic class.

2. Which two IP SLA Probe types can be used to measure voice quality? (Choose two.)

A) HTTP
B) UDP Echo
C) ICMP Path Jitter
D) UDP Jitter
E) UDP Delay
F) UDP MOS

3. 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.

4. Which three match statements are valid in Cisco IOS XR Software? (Choose three.)

A) match field
B) match mpls experimental topmost
C) match vpls
D) match port-type
E) match flow
F) match qos-group

5. Refer to the exhibit.

Which queueing method has been configured?

A) CBWFQ
B) MDRR
C) WFQ
D) priority queueing
E) LLQ

Solutions: