单选题What is a characteristic of ISL and 802.1q frame tagging in a switched LAN environment?()AThey are used to find the best path through a network.BThey allow the exchange of filtering tables.CThey specify different implementations of the Spanning-Tree Protocol.DThey allow the exchange of routing tablesEThey provide inter-switch VLAN communication.

单选题
What is a characteristic of ISL and 802.1q frame tagging in a switched LAN environment?()
A

They are used to find the best path through a network.

B

They allow the exchange of filtering tables.

C

They specify different implementations of the Spanning-Tree Protocol.

D

They allow the exchange of routing tables

E

They provide inter-switch VLAN communication.


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