Refer to the exhibit. Why does the trust state of interface FastEthernet 0/3 show "not trusted"？（） A: DSCP map needs to be configured for VOI B: C: ToS has not been configured. D: ToS has been misconfigured. E: The command mls qos needs to be turned on in global configuration mode. F: There is not a Cisco Phone attached to the interface.

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2022-05-29 问题

Refer to the exhibit. Why does the trust state of interface FastEthernet 0/3 show "not trusted"？（） A: DSCP map needs to be configured for VOI B: C: ToS has not been configured. D: ToS has been misconfigured. E: The command mls qos needs to be turned on in global configuration mode. F: There is not a Cisco Phone attached to the interface.