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Cisco Quality of Service (QoS) Sample Questions:

1. Based on the following 2950 switch configurations, which statement is correct?
no wrr-queue cos-map wrr-queue bandwidth 20 10 70 1 wrr-queue cos-map 4 5 wrr-queue cos-map 1 0 1 2 3 wrr-queue cos-map 3 6 7

A) Queue 2 is setup as the expedite queue.
B) Queue 3 is setup as the expedite queue.
C) Queue 4 is setup as the expedite queue.
D) Queue 1 is setup as the expedite queue.
E) No queue is setup as the expedite queue.

2. Where is the error in the following policy-map configuration?
policy-map test class voice priority 168 class mission-critical bandwidth 192 random-detect class class-default fair-queue bandwidth 128

A) The bandwidth command is not a valid command for the class-default traffic class in this case.
B) The mission-critical traffic class bandwidth guarantee should be lower than the voice traffic class priority bandwidth guarantee.
C) Fair-queue should be enabled for the mission-critical traffic class.
D) The voice traffic class is missing the random-detect command.
E) The mission-critical traffic class is missing the queue-limit command.

3. Which command is typically applied to the voice traffic class within a policy-map?

A) shape peak {bps}
B) random-detect dscp-based
C) compress header ip rtp
D) shape average {bps}
E) fair-queue
F) bandwidth {kbps}

4. Which mechanism is used for the prioritizing, protection, and isolation of traffic based on marking?

A) classification and marking
B) shaping
C) congestion avoidance
D) congestion management
E) metering
F) policing

5. Based on the following Cisco Catalyst 2950 Series switch configurations, which additional command will enable these actions?
Traffic marked with a CoS of 6 or 7 will be serviced by the priority queue.
Traffic marked with a CoS of 0, 1, or 2 will have a 20-percent weight when serviced by the wrr queue.
Traffic marked with a CoS of 4 will have a 30-percent weight when serviced by the wrr queue.
Traffic marked with a CoS of 3 or 5 will have a 50-percent weight when serviced by the wrr queue.
Catalyst 2950 partial configuration:
no wrr-queue cos-map
wrr-queue cos-map 1 0 1 2
wrr-queue cos-map 2 4
wrr-queue cos-map 3 3 5
wrr-queue cos-map 4 6 7

A) wrr-queue bandwidth 10 15 25 0
B) wrr-queue bandwidth 1 10 15 25
C) wrr-queue bandwidth 15 25 10 0
D) wrr-queue bandwidth 15 25 10 1
E) wrr-queue bandwidth 1 20 30 50

Solutions: