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Cisco Quality of Service (QoS) Sample Questions:

1. Which two of the following statements about CBWFQ are correct? (Choose two.)

A) The CBWFQ scheduler provides a guaranteed amount of minimum bandwidth to each class.
B) CBWFQ services each class queue using a strict priority scheduler.
C) The class-default queue only supports WFQ.
D) Each CBWFQ traffic class is policed using a congestion aware policer.
E) Inside a class queue, processing is always FIFO, except for the class-default queue.

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

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

3. What are three methods of reducing delay for critical applications in a converged network? (Choose three.)

A) Increase link capacities.
B) Reduce inter-packet gaps.
C) Apply header compression.
D) Increase LFI fragment size.
E) Increase all queue depths.
F) Apply payload compression.

4. Which two different traffic types have the most similar sensitivity to latency, jitter, and packet loss? (Choose two.)

A) peer-to-peer file sharing
B) video conferencing
C) voice
D) streaming video
E) SQL transactions
F) voice signaling

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

Solutions: