A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.
Answer: C
Explanation:
By default, all VLANs that are configured to be in the same VTP domain will be allowed
by the VTP trunk.
A. Only the VLANs contained in the same VTP domain will traverse the trunk.
B, D. These commands do not have any influence on the VLANs that will be allowed
over a trunk.