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多项选择题 Refer to the exhibit.  Which two statements are true about the required switch configurations to  support a voice VLAN？（）

A、CDP must be disabled on the switch port to prevent interference between CDP messages and  voice traffic.

B、Port security cannot be configured on a port that is configured for a voice vlan.

C、Static secure MAC addresses should be configured on voice vlan ports to prevent access by  devices other than IP phones.

D、CDP must be enabled on the switch port to allow configuration information to be passed to the  IP phone.

E、Portfast must be enabled on the switch port.

F、802.1x authentication cannot be configured on a port configured for a voice vlan.

  • D,E

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