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What helps avoid split brain in active-passive high availability (HA) pair deployment?
Correct Answer: D
To avoid split brain scenarios in an active-passive high availability (HA) pair deployment, the management interface can be used as the HA1 backup link. This ensures reliable communication between the HA pair and prevents both firewalls from assuming the active role simultaneously, which can happen if they lose connectivity with each other on the primary HA1 link. References: * Palo Alto Networks High Availability Guide: HA Configuration * Best Practices for HA Configuration: Avoiding Split Brain