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Cisco 642-642 Exam Syllabus Topics:

Cisco Quality of Service (QoS) Sample Questions:

1. HOTSPOT

2. Refer to the partial router configuration. Which two of the following statements are true? (Choose two.)

A) Any IP packet will be subject to policing.
B) Only those packets which satisfy all of the matches in class1 and class2 will be subject to policing.
C) The configuration is invalid since it refers to a class map within a different class.
D) Regardless of destination IP address, all traffic sent to Mac address 1.2.3 will be subject to policing
E) The class-map class1 command will set the qos-group value to 4 for all IP packets.
F) All traffic from a server with the IP address of 147.23.54.21 will be subject to policing.

3. DRAG DROP

4. For which service is assured forwarding PHB used?

A) best effort
B) guaranteed bandwidth
C) expedited forwarding
D) class selector

5. Based on the following Cisco Catalyst 2950 Series switch configurations, which additional command will enable these actions?
Traffic marked with a CoS of 6 or 7 will be serviced by the priority queue.
Traffic marked with a CoS of 0, 1, or 2 will have a 20-percent weight when serviced by the wrr queue.
Traffic marked with a CoS of 4 will have a 30-percent weight when serviced by the wrr queue.
Traffic marked with a CoS of 3 or 5 will have a 50-percent weight when serviced by the wrr queue.
Catalyst 2950 partial configuration:
no wrr-queue cos-map
wrr-queue cos-map 1 0 1 2
wrr-queue cos-map 2 4
wrr-queue cos-map 3 3 5
wrr-queue cos-map 4 6 7

A) wrr-queue bandwidth 15 25 10 1
B) wrr-queue bandwidth 15 25 10 0
C) wrr-queue bandwidth 10 15 25 0
D) wrr-queue bandwidth 1 10 15 25
E) wrr-queue bandwidth 1 20 30 50

Solutions: