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Cisco Quality of Service (QoS) Sample Questions:

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

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

2. HOTSPOT

3. Switch port fa0/2 has been configured to connect an IP phone with an attached PC. Given the set of commands shown below, where does the trust boundary lie?
interface fa0/2 mls qos trust cos mls qos trust device cisco-phone switchport voice vlan 112

A) between the IP phone and the switch
B) between the IP phone and the PC
C) between the access layer switch and the distribution layer switch
D) between the PC port and the LAN port on the IP phone

4. DRAG DROP
Drop

5. For which service is assured forwarding PHB used?

A) best effort
B) class selector
C) guaranteed bandwidth
D) expedited forwarding

Solutions: