单选题When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?（）ABy default， all defined VLANs are allowed on the trunk.BEach single VLAN， or VLAN range， must be specified with the switchport mode command.CEach single VLAN， or VLAN range， must be specified with the vtp domain command.DEach single VLAN， or VLAN range， must be specified with the vlan database command.
单选题
When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?（）
A
By default， all defined VLANs are allowed on the trunk.
B
Each single VLAN， or VLAN range， must be specified with the switchport mode command.
C
Each single VLAN， or VLAN range， must be specified with the vtp domain command.
D
Each single VLAN， or VLAN range， must be specified with the vlan database command.
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