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Cisco 642-785 Exam -

Free 642-785 Sample Questions:

Q: 1
What would be the first step when defining an MQC?
A. Add one or mare Match commands to classify packets
B. Attach the traffic policy (policy map) to the interface by using the service-policy command.
C. Define a traffic class by using the class-map command.
D. Apply the commands such as bandwidth, police, and set dscp to enable the QoS feature.
E. Create a traffic policy by using the policy-map command.
Answer: C

Q: 2
When is best-effort QoS policy mast appropriate?
A. when the customer has high bandwidth access to the network
B. when the customer will only transport delay-tolerant data
C. when the CE is self-managed and the customer provides adequate QoS marking
D. when the customer plans to transport data from no more than one multimedia application
Answer: B

Q: 3
A provider plans to use IP SLA to help diagnose future performance issues in their PE routers in the network. Which two should be considered by the provider? (Choose two)
A. IP SLA requires a significant amount of resources to operate properly. Using IP SLA on the PE routers will only aggravate performance-related issues the network already encounters.
B. IP SLA is supported only an Cisco IOS edge routers, because it simulates traffic from the network endpoints.
C. P SLA should be implemented on dedicated hardware to properly simulate network endpoints.
D. P SLA should use a mix of source and target points.
Answer: C, D

Q: 4
Which Cisco IOS command lists all traffic classifications?
A. show class-map
B. show policy-map
C. show service-policy
D. show qos
Answer: A

Q: 5
Which four factors can be used for packet classification in a QoS-aware network device? (Choose four)
A. source address
B. destination address
F. IP precedence
Answer: A, B, C, F

Q: 6
Which the customer LAN is managed by the service provider and the network is oversubscribed, what is the best location for use of congestion avoidance mechanisms?
A. on output interfaces from the customer IAN leading into the service provider network
B. in interfaces in the service provider network incoming from the customer LAN
C. in the service provider core
D. on output interfaces from the service provider network leading to the customer LAN
Answer: A

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