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| Exam Code/Number: | 642-642Join the discussion |
| Exam Name: | Quality of Service (QoS) |
| Certification: | Cisco |
| Question Number: | 87 |
| Publish Date: | Oct 21, 2026 |
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Total 87 questions
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
SIMULATION - LAB
R1#configure terminal
R1(config)#policy-map llq-policy
R1(config-pmap)#class voice
R1(config-pmap-c)#prority 168
R1(config-pmap-c)#exit
R1(config-pmap)#class interactive
R1(config-pmap-c)#prority 30
R1(config-pmap-c)#exit
R1(config-pmap)#class bulk
R1(config-pmap-c)#prority 16
R1(config-pmap-c)#exit
R1(config-pmap)#class class-default
R1(config-pmap-c)#fair-queue
R1(config-pmap-c)#exit
R1(config-pmap)#exit
R1(config)#int s0/0
R1(config-if)#service-policy output llq-policy
What are two errors in this policy-map configuration? (Choose two.)
policy-map test
class voice
priority 64
class bulk
bandwidth percent 20
fair-queue
class interactive
bandwidth percent remaining 10
fair-queue
class class-default
fair-queue
In which two locations is the qos pre-classify command applied to support QoS preclassification over an IPSec/GRE tunnel? (Choose two.)