Which three of these statements regarding 802.1 Q trunking are correct? (Choose three.)

A.
802.1 Q native VLAN frames are untagged by default.

B.
802.1 Q trunking ports can also be secure ports.

C.
802.1 Q trunks can use 10 Mb/s Ethernet interfaces.

D.
802.1 Q trunks require full-duplex, point-to-point connectivity.

E.
802.1 Q trunks should have native VLANs that are the same at both ends.

Explanation:
By default, 802.1 Q trunk defined Native VLAN in order to forward unmarked frame. Switches can forward Layer 2 frame from Native VLAN on unmarked trunks port. Receiver switches will transmit all unmarked packets to Native VLAN. Native VLAN is the default VLAN configuration of port. Note: for the 802.1 Q trunk ports between two devices, the same Native VLAN configuration is required on both sides of the link. If the Native VLAN in 802.1 Q trunk ports on same trunk link is properly configured, it could lead to layer 2 loops. The 802.1 Q trunk link transmits VLAN information through Ethernet.