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Cisco Quality of Service (QoS) Sample Questions:

1. Refer to the exhibit. Which three statements are true about the configuration? (Choose three.)
class-map class-1
match ip rtp 2024 1000
class-map class 2
match dscp 5 6 7
policy-map access-group-1-traffic
class class-1
shape peak 16000
class class-2
police 8000 1000
conform-action set-dscp-transmit 1
exceed-action set-dscp-transmit 0
violate-action drop
class class-default
fair-queue 16
queue-limit 20
interface fastethernet 0/0
service-policy output access-group1-traffic

A) IP traffic (DSCP 0) that is sent on fastethernet 0/0 will be subject to fair queuing.
B) Traffic that is subject to policing will have the DCSP set to 0 if the rate exceeds 1000 bps.
C) Traffic that is subject to shaping can burst up to 32,000 bps.
D) RTP traffic (ports 2024 and 1000) that is sent on fastethernet 0/0 will be traffic shaped.
E) IP traffic (DSCPs 5, 6, and 7) that is sent on fastethernet 0/0 will be traffic policed.
F) IP traffic (DSCPs 1, 2, 3, and 4) that is sent on fastethernet 0/0 are considered to have a violate status and are dropped.

2. What are three reasons link efficiency mechanisms are deployed on WAN links? (Choose three.)

A) increase throughput
B) increase link speed
C) decrease delay
D) decrease jitter
E) decrease propagation delay

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

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

4. What are two benefits of WFQ? (Choose two.)

A) Based on DSCP, WFQ allows weighted, random dropping of packets when the WFQ system is full.
B) WFQ is very easy to configure, and no manual traffic classification is necessary.
C) WFQ can provide fixed-bandwidth and fixed-delay guarantees.
D) WFQ prevents the large-volume flows with large packet size from starving out the low-volume flows with small packet size.
E) WFQ can provide fixed-bandwidth guarantees.
F) WFQ can provide fixed-delay guarantees.

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

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

Solutions: