Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 149

Which of the following commands can be issued without interfering with the operation of loop guard?

Answer options

• A. Switch(config-if)#spanning-tree guard root
• B. Switch(config-if)#spanning-tree portfast
• C. Switch(config-if)#switchport mode trunk
• D. Switch(config-if)#switchport mode access

Correct answer: C

Explanation

The command 'Switch(config-if)#switchport mode trunk' can be issued without affecting loop guard's operation, as it relates to the port's VLAN configuration. In contrast, the other commands either enable features that directly interact with spanning-tree operations or modify port behavior in a way that could impact loop guard functionality.