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Cisco Quality of Service (QoS) Sample Questions:

1. In a typical converged campus network, which two of the following are considered QoS best practices? (Choose two.)

A) NBAR is used at the high speed core layer to discover and classify network applications.
B) Only a reasonable number of applications should be classified into the mission-critical traffic class.
C) Traffic classification and marking is performed at the high speed core layer.
D) Ensure voice traffic is serviced by a weighted fair queue.
E) Traffic classification and marking is performed as close to the traffic source as possible.
F) Catalyst switches should use weighted round robin (WRR) queuing giving the voice traffic the highest priority.

2. SIMULATION - LAB

A) Please click console

3. Which command is typically applied to the voice traffic class within a policy-map?

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

4. Which QoS mechanism calculates the mean queue depth to determine its operation?

A) WFQ
B) class-based shaping
C) class-based policing
D) WRED
E) LLQ/CBWFQ

5. When configuring a Cisco Catalyst switch to accommodate an IP phone with an attached PC, it is desired that the trust boundary be set between the IP phone and the switch. Which two commands on the switch are recommended to set the trust boundary as described? (Choose two.)

A) mls qos trust cos
B) mls qos trust device cisco-phone
C) no mls qos trust dscp
D) mls qos cos 5
E) mls qos trust extend [cos value]
F) switchport priority extend trust

Solutions: