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Cisco Quality of Service (QoS) Sample Questions:

1. Refer to the exhibit. QPPB is being used by the service provider (AS30). The table-map and route-map called "important" are implemented on router POP A.
The command bgp-policy destination ip-prec-map is applied to the interface between POP A in AS30 and NAP (AS40).
Which QoS action would have to be applied on POP B in AS30 to ensure that the traffic from the NAP (AS40) to the customer (AS20) will be marked with an IP precedence of flash?

A) Traffic from AS20 must have the extended community attribute set to10:50 in a route-map, and send-community extended (or send-community both) must be specified.
B) Traffic from AS20 must be automatically marked via an inbound QoS map on POP B, resulting in the community attribute set to10:50.
C) Traffic from AS20 must have the community attribute set to10:50 in a route-map, and send-community must be specified.
D) No actions are needed. Traffic must be marked in AS20 by the customer as10:50 before it arrives at the service provider.

2. QoS policy propagation through BGP (QPPB) supports which two QoS markers? (Choose two.)

A) MPLS EXP
B) QoS group
C) IP precedence
D) COS
E) DSCP

3. When configuring WFQ, what is the default number of dynamic queues based on?

A) drop probability denominator
B) interface bandwidth
C) hash of the packet headers
D) inter-packet arrival rate
E) hold-queue limit
F) congestive discard threshold (CDT)

4. DRAG DROP
Drop

5. What describes the use of best-effort service with overprovisioning?

A) ensuring quality of service by providing more than the aggregate bandwidth required
B) ensuring quality of service by deploying sophisticated prioritization and congestion management mechanisms
C) ensuring quality of service by being able to load balance across links in times of congestion
D) ensuring availability and quality of service by always provisioning key services across at least two service provider networks
E) ensuring constant availability by provisioning multiple paths through the network

Solutions: