ICND2: Interconnecting Cisco Networking Devices Part 2 (legacy) — Question 32

Which feature can prevent a rogue device from assuming the role of the root bridge in a switching domain?

Answer options

• A. VTP
• B. BPDU Filter
• C. DTP
• D. Root Guard

Correct answer: B

Explanation

BPDU Filter is the correct answer because it prevents BPDU messages from being sent or received on a port, thus stopping rogue devices from participating in the Spanning Tree Protocol process. VTP (A) and DTP (C) are related to VLAN management and trunk negotiation, respectively, but do not directly address root bridge prevention. Root Guard (D) is also a valid feature but is specifically used to protect specific ports from becoming a root port, rather than filtering BPDUs.