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Cisco 642-642 Exam Syllabus Topics:

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

2. SIMULATION - LAB

A) Please click console

3. HOTSPOT

4. What does the following command accomplish?
router(config-pmap-c)# shape fecn-adapt

A) enables the router to lower the shaping rate when BECN bits are received
B) enables the router to increase the shaping rate when FECN bits are received
C) enables the router to respond to FECN bits by creating test frames in the opposite direction with the BECN bit set
D) enables the router to lower the shaping rate when FECN bits are received
E) enables the router to respond to BECN bits by creating test frames in the opposite direction with the FECN bit set
F) enables the router to increase the shaping rate when BECN bits are received

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

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

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