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Cisco Quality of Service (QoS) Sample Questions:

1. At the network layer, IP packets are typically classified based on which three items? (Choose three.)

A) VLAN Identifier
B) source and destination IP addresses
C) packet length
D) flow control bits
E) content of the ToS byte

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

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

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

4. Which three statements regarding WRED are true? (Choose three.)

A) WRED uses a shaping queue to delay excess traffic.
B) WRED can be applied to a traffic class using CB-WRED.
C) WRED can be IP precedence-based or DSCP-based.
D) WRED is used to rate-limit the incoming traffic by metering the incoming traffic rate.
E) WRED is an advanced queuing mechanism.
F) ECN is an extension of WRE

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

Solutions: