HPE Aruba Certified Mobility Professional (ACMP) — Question 97

What is one difference between BPDU protection and root guard?

Answer options

• A. BPDU protection works with RPVST+, RSTP, and MSTP. Root guard works with RSTP or MSTP, but not RPVST+.
• B. BPDU protection blocks a port if it receives any BPDU, but root guard blocks a port only if the BPDU indicates a better root path.
• C. BPDU protection is typically implemented on edge ports, but root guard is typically implemented on uplinks with the root port role.
• D. BPDU protection drops BPDUs received on a port, but does not block the port. Root guard blocks the port if it receives a BPDU.

Correct answer: B

Explanation

The correct answer, B, accurately describes the behavior of BPDU protection and root guard. While BPDU protection shuts down a port upon receiving any BPDU, root guard only activates when a BPDU indicates a better root path, allowing for more nuanced control over the network topology. The other options incorrectly mix the functionalities or applications of BPDU protection and root guard.