a. The IP Phone always trusts the class of service (CoS) information coming from the PC.
b. The IP Phone never trusts the PC and always overwrites the CoS bits.
c. QoS trust for the PC data is handled at the Catalyst switch port, not the IP Phone.
d. The Catalyst switch instructs the IP Phone how to trust the PC QoS information.
Free Cisco CCNP Switching Questions
When a PC is connected to the PC switch port on an IP Phone, how is QoS trust
handled?
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