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Cisco Quality of Service (QoS) Sample Questions:

1. Which four of the following bit values are used for bits 5-7 of the DSCP field to select AF PHB? (Choose four.)

A) 010
B) 001
C) 011
D) 101
E) 100
F) 000

2. What does the following command accomplish?
router(config-pmap-c)# shape fecn-adapt

A) enables the router to lower the shaping rate when BECN bits are received
B) enables the router to lower the shaping rate when FECN bits are received
C) enables the router to increase the shaping rate when FECN bits are received
D) enables the router to respond to BECN bits by creating test frames in the opposite direction with the FECN bit set
E) enables the router to increase the shaping rate when BECN bits are received
F) enables the router to respond to FECN bits by creating test frames in the opposite direction with the BECN bit set

3. 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) No actions are needed. Traffic must be marked in AS20 by the customer as10:50 before it arrives at the service provider.
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) 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.

4. Which two commands are typically applied to the voice traffic class within a policy-map? (Choose two.)

A) shape peak {bps}
B) random-detect dscp-based
C) priority {kbps}
D) compress header ip rtp
E) bandwidth {kbps}
F) random-detect ecn

5. Which mechanism is used for the prioritizing, protection, and isolation of traffic based on marking?

A) policing
B) shaping
C) congestion management
D) congestion avoidance
E) classification and marking
F) metering

Solutions: