Cisco 642-642 Exam : Quality of Service (QoS)

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Cisco 642-642 Exam Syllabus Topics:

Cisco Quality of Service (QoS) Sample Questions:

Question 1

Refer to the exhibit. According to the show output, which statement is true?

A. NBAR protocol discovery has been enabled on the router through the use of the match protocol commands within the class-map.
B. HTTP is the most active protocol on the Fa0/0 interface based on byte count.
C. The 5-minute average bits-per-second rate for all traffic entering the Fa0/0 interface is 398 kbps.
D. The unknown protocol traffic statistics refer to all the traffic matched by the class-default traffic class.
E. There is a total of 39,990 NetBIOS packets exiting the Fa0/0 interface.

Question 2

Which three characteristics best describe a converged network? (Choose three.)

A. the random dropping of lower priority traffic to ensure that high-priority traffic gets through
B. the use of overprovisioning to ensure voice quality
C. the potential for poor voice quality due to other traffic
D. the separation of the voice and data networks into two networks to ensure voice quality
E. the use of a separate high-speed link for bulk traffic to avoid interference with other traffic
F. prioritization and congestion management to ensure voice quality

Question 3

DRAG DROP
Drop

Question 4

A Frame Relay interface has been configured for adaptive shaping with a minimum rate of 15 kbps. The current maximum transmit rate is 56 kbps.
If three FECNs are received over the next 4 seconds, what will be the maximum transmit rate after the last FECN has been received?

A. 10 kbps
B. 56 kbps
C. 15 kbps
D. 28 kbps
E. 7 kbps
F. 37 kbps

Question 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. WRED is used to rate-limit the incoming traffic by metering the incoming traffic rate.
D. WRED can be applied to a traffic class using CB-WRED.
E. ECN is an extension of WRE
F. WRED is an advanced queuing mechanism.

Solutions: