Which two statement about voice VLANs are true? (Choose two.)

Which two statement about voice VLANs are true? (Choose two.)
A . The VLAN number must be in the range 2000 through 4096
B . They support static source MAC address
C . They require PortFast to be enabled manually on the interface
D . When they are enabled, all CoS values in incoming traffic are untrusted
E . They are disabled by default
F . When they are enabled, all untagged traffic is assigned a CoS of 5

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Answer: EF