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Cisco Quality of Service (QoS) Sample Questions:

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

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

2. SIMULATION - LAB

A) Please click console

3. DRAG DROP
Drop

4. 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) The IP phone will allow the data packet through without modifying theCoS settings of the data frame.
B) 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.
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, by default, overwrite the switch CoS value and mark the data packet asCoS0.

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

Solutions: