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Refer to the exhibit. Which VLANs are permitted to send frames out port FastEthernet0/1?
Correct Answer: D
Explanation/Reference: Traffic on the native vlan does not get tagged as it crosses a trunk, so there is no dot1q tag in the first place to be filtered. And you don't need to allow the native vlan. But if we force to tag the native vlan (with the "switchport trunk native vlan tag" command) then if the native vlan is not in the "allowed vlan" list it will be dropped.