Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 127

Which of these options supports to maintain the network architecture and stability of the root bridge in a spanning-tree service?

Answer options

• A. BPDU Filter
• B. BPDU Guard
• C. Root Guard
• D. Loop Guard

Correct answer: C

Explanation

The correct answer, Root Guard, is designed to maintain the stability of the root bridge by preventing a designated port from becoming a root port if it receives a superior Bridge Protocol Data Unit (BPDU). BPDU Filter and BPDU Guard serve different purposes related to controlling BPDU propagation, while Loop Guard is focused on preventing bridging loops, not specifically on root bridge stability.