Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 9

What is the command for configuring root guard?

Answer options

• A. (config)#spanning-tree guard root
• B. (config-if)#spanning-tree guard root
• C. (config-if)#spanning-tree root guard
• D. (config-if)#spanning tree guard root
• E. (config)#spanning-tree root guard

Correct answer: B

Explanation

The correct command to configure root guard is '(config-if)#spanning-tree guard root', which applies the root guard setting on an interface. Other options either use the wrong command structure or context, such as using '(config)' instead of '(config-if)' or incorrect command syntax.