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Cisco Quality of Service (QoS) Sample Questions:

1. HOTSPOT

2. 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 1 20 30 50
B) wrr-queue bandwidth 15 25 10 1
C) wrr-queue bandwidth 1 10 15 25
D) wrr-queue bandwidth 10 15 25 0
E) wrr-queue bandwidth 15 25 10 0

3. Which two commands are typically applied to the voice traffic class within a policy-map? (Choose two.)

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

4. The show policy-map interface command output is showing too many random drops for the mission-critical traffic class. What can be changed to reduce the random drops?

A) Decrease the WRED drop probability denominator for the mission-critical traffic class.
B) Decrease the queue-limit for the mission-critical traffic class.
C) Increase the WRED max-threshold value for the mission-critical traffic class.
D) Enable fair-queue within the mission-critical traffic class.
E) Increase the WRED min-threshold value for the mission-critical traffic class.

5. In a typical converged campus network, which two of the following are considered QoS best practices? (Choose two.)

A) Ensure voice traffic is serviced by a weighted fair queue.
B) Catalyst switches should use weighted round robin (WRR) queuing giving the voice traffic the highest priority.
C) NBAR is used at the high speed core layer to discover and classify network applications.
D) Only a reasonable number of applications should be classified into the mission-critical traffic class.
E) Traffic classification and marking is performed as close to the traffic source as possible.
F) Traffic classification and marking is performed at the high speed core layer.

Solutions: