问题:
Refer to the exhibit.
What is the effect when the switchport priority extend cos 3 command is configured on the switch port interface connected to the IP phone?()
A . The IP phone is enabled to override with aCoS value of 3 the existing CoS marking of the PC attached to the IP phone.
B . The switch will no longer tag incoming voice packets and will extend the trust boundary to the distribution layer switch.
C . RTP will be used to negotiate aCoS value based upon bandwidth utilization on the link.
D . Effectively, the trust boundary has been moved to the PC attached to the IP phone.
E . The computer is now establishing theCoS value and has effectively become the trust boundary.
Refer to the exhibit.
What is the effect when the switchport priority extend cos 3 command is configured on the switch port interface connected to the IP phone?()
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