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Cisco Quality of Service (QoS) Sample Questions:

1. Based on the configuration, which two of the following statements are true? (Choose two.)
policy-map police 1
class bulk-ftp
police cir percent 20 pir percent 40
conform-action set-dscp-transmit af11
exceed-action set-dscp-transmit 0
violate-action drop

A) This is a multi-action, class-based policing example.
B) This is a percentage-based policing example.
C) This configuration will drop all exceeding traffic.
D) This configuration will use a single token bucket.
E) This is a dual-rate, class-based policing example.

2. DRAG DROP
Drop

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

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

4. Where is the fragment size configured when using FRF.12 link fragmentation and interleaving?

A) within the MQC service-policy
B) within the physical serial interface
C) within the Frame Relay map-class
D) within the logical multilink interface
E) within the MQC class-map
F) within the MQC policy-map

5. Based on the following policy-map configuration, the bulk traffic class packets are not being ECN
marked, yet there are many random drops in the bulk traffic class. What is the most likely cause of
the problem?
router(config)# policy-map MyPolicy
router(config-pmap)# class bulk
router(config-pmap)# bandwidth 128
router(config-pmap-c)# random-detect dscp-based
router(config-pmap-c)# random-detect dscp af31 32 40 10
router(config-pmap-c)# random-detect dscp af32 28 40 10
router(config-pmap-c)# random-detect dscp af33 24 40 10
router(config-pmap-c)# random-detect ecn

A) The endpoints generating the bulk traffic packets are not ECN capable.
B) The CB-WRED min threshold is set too low.
C) Some of the routers within the traffic path are not ECN capable.
D) The CB-WRED mark probability denominator is set too low.
E) The CB-WRED max threshold is set too high.

Solutions: