Which Cisco IOS command is used on a Cisco Catalyst 6500 series switch to view the spanning-tree protocol (STP) information for a virtual LAN (VLAN)?

A. show spanning tree

B. show spanning-tree vlan

C. show spantree
D. show spantree vlan

Explanation:

The show spanning-tree vlan Cisco IOS command is used on a Catalyst 6500 series switch to view the spanning-tree information for a VLAN, such as information on the root switch (bridge ID, root path, root cost), as well as local switch.

The following is sample output of the show spanning-treevlan vlan-id command:

The show spanning tree command is incorrect because it is not the correct syntax of a Cisco IOS command.

The show spantree and show spantree vlan commands are incorrect because these are CatOS commands, not Cisco IOS commands.

Objective:
LAN Switching Fundamentals
Sub-Objective:
Configure and verify Layer 2 protocols

References:
Cisco > Cisco IOS LAN Switching Command Reference > show spanning-tree