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Cisco Quality of Service (QoS) Sample Questions:

1. 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) 15 kbps
B) 37 kbps
C) 7 kbps
D) 28 kbps
E) 56 kbps
F) 10 kbps

2. According to the best practices, in a service provider network, which statement is true as related to the QoS policy that should be implemented on the inbound provider (P) to provider (P) router link?

A) In the DiffServ model, all ingress and egress QoS processing are done at the network edge (for example, PE router), so no input or output QoS policy will be needed on the P to P link.
B) Class-based marking should be implemented because it will be needed for the class-based queuing that will be used on the P router output.
C) Because traffic should have already been policed and marked on the upstream ingress PE router, no input QoS policy is needed on the P to P link.
D) Traffic policing should be implemented to rate-limit the ingress traffic into the P router.

3. Refer to the exhibit. A service provider is considering several alternative provisioning schemes for a new network. One proposed scheme involves aggregating 10-Mbps links from customers into a network with multiple 100-Mbps links to ensure that the network links have at least two times the capacity of the aggregate of the customer links.
What is the most appropriate description for the proposed scheme?

A) Bandwidth-on-Demand
B) overaggregate
C) oversubscription
D) overprovisioning
E) CIR of 0

4. Which algorithm (discard method) does WRED use to determine which packets will be dropped when the average queue length becomes larger than the user-specified maximum threshold?

A) random discard
B) tail discard
C) weighted early discard
D) packet size based discard

5. Where is the fragment size configured when using FRF.12 link fragmentation and interleaving?

A) within the MQC policy-map
B) within the logical multilink interface
C) within the MQC service-policy
D) within the MQC class-map
E) within the Frame Relay map-class
F) within the physical serial interface

Solutions: