Question

"STP:

You want to prevent new switches from being elected root. Which command should you enter?"

A) spanning-tree mode pvst
B) spanning-tree vlan root primary
C) spanning-tree portfast
D) spanning-tree priority .

Answer 1

The command to prevent new switches from being elected root is spanning-tree vlan root primary.

Step-by-step explanation:

The correct answer is B) spanning-tree vlan root primary. This command is used in spanning tree protocol (STP) to specify that a particular switch should be the root switch for the specified VLAN. By entering this command, you are ensuring that new switches will not be elected as the root switch.