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Which action allows a network engineer to limit a default VLAN from being propagated across all trunks?

Which action allows a network engineer to limit a default VLAN from being propagated across all trunks?
A . Upgrade to VTP version 3 for advanced feature set support.
B . Enable VTP pruning on the VTP server.
C . Manually prune default VLAN with switchport trunk allowed vlans remove.
D . Use trunk pruning vlan 1.

Answer: C

Explanation:

Manaully pruning the default VLAN (1) can only be done with the "switchport trunk allowed vlans remove" command. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. The "trunk pruning vlan 1" option is not a valid command.

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