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Cisco Quality of Service (QoS) Sample Questions:

1. Which two different traffic types have the most similar sensitivity to latency, jitter, and packet loss? (Choose two.)

A) streaming video
B) video conferencing
C) SQL transactions
D) voice
E) voice signaling
F) peer-to-peer file sharing

2. DRAG DROP
Drop

3. Which three statements regarding WRED are true? (Choose three.)

A) WRED is an advanced queuing mechanism.
B) WRED is used to rate-limit the incoming traffic by metering the incoming traffic rate.
C) WRED uses a shaping queue to delay excess traffic.
D) ECN is an extension of WRE
E) WRED can be IP precedence-based or DSCP-based.
F) WRED can be applied to a traffic class using CB-WRED.

4. What is the purpose of using multiactions traffic policing?

A) so that conform, exceed, and violate traffic can be marked with different CLPs
B) so that conform traffic from different flows can be marked with different DSCPs
C) so that class-based policing can mark at Layer 2 and Layer 3 at the same time
D) so that traffic can be policed using two separate rates
E) so that exceed traffic can be shaped and violate traffic can be policed

5. A Cisco Catalyst switch has an IP phone connected to its Fastethernet0/2 port. The IP phone has an attached PC. The Fastethernet0/2 port on the switch has been configured with the commands mls qos trust cos, mls qos trust device cisco-phone, and switchport priority extend trust.
What will happen to a data frame with a CoS of 5 that is sent from the PC through the IP phone to port Fastethernet0/2 on the switch?

A) While the packet will pass through the IP phone without modification, the switch will, by default, override theCoS priority with the switch default CoS priority.
B) The IP phone will, by default, overwrite the switch CoS value and mark the data packet asCoS0.
C) The switch will instruct the phone to allow the packet through without modification only if the phone has been configured to do so.
D) The IP phone will allow the data packet through without modifying theCoS settings of the data frame.

Solutions: