Regarding the processing of data frames by the data board port, which of the following is correct? (Multiple choice)

Regarding the processing of data frames by the data board port, which of the following is correct? (Multiple choice)
A . The port set as the tag Aware attribute can only discard the data without vlan tag
B. Hybrid ports can realize mixed transmission of tag and untag services
C. When the Ethernet port is set to Tag aware, there is no need to set the default VLAN of the port ID, the default VLAN ID of the port needs to be set only when it is set to Access

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Answer: AB