Which statement about 802.1Q trunking is true?

A.
Both switches must be in the same VTP domain.

B.
The encapsulation type on both ends of the trunk does not have to match.

C.
The native VLAN on both ends of the trunk must be VLAN 1.

D.
In 802.1Q trunking, all VLAN packets are tagged on the trunk link, except the native
VLAN.

Explanation:
E is correct because, “frames from the native VLAN of an 802.1Q trunk are not tagged with
the VLAN number.”
Reference:
http://www.cisco.com/warp/public/473/27.html