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Cisco Quality of Service (QoS) Sample Questions:

1. QoS policy propagation through BGP (QPPB) supports which two QoS markers? (Choose two.)

A) MPLS EXP
B) QoS group
C) IP precedence
D) COS
E) DSCP

2. Which technology is required when configuring FRF.12 on a Cisco device?

A) VoFR
B) FRTS
C) WRED
D) FRF11.c
E) FRF.8
F) MLP with interleaving

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

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

4. The following commands have been configured under the fa0/1 interface on the 2950 switch:
wrr-queue bandwidth 20 1 80 0
mls qos trust cos
mls qos trust device cisco-phone
Voice traffic from the IP phone that is directly connected to the fa0/1 interface is experiencing excessive delays. What could be the cause of this problem?

A) The default cos-to-dscp map is being used.
B) The default dscp-to-cos map is being used.
C) The default wrr-queue cos-map is being used.
D) The wrr-queue bandwidth weightings are not correct.
E) The trust boundary configuration is not correct.

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

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

Solutions: