What single Cisco IOS command can be issued to ensure that a specific switch within the network becomes the STP root switch?
A) spanning-tree root
B) spanning-tree priority root
C) spanning-tree root tvlan vlan-id primary
D) spanning-tree vlan vlan-id root primary
D
Explanation: D) The spanning-tree vlan vlan-id root primary Cisco IOS command can be issued on the switch that is intended to be a specific VLAN's root switch. It will alter the STP priority to be lower than the other switches within the network.
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