Câu 18: SD-WAN-ENGINEER: Palo Alto Networks SD-WAN Engineer

In a branch high availability (HA) deployment, which action is taken by the standby device when the active device goes down?

1. A. It notifies the controller, which then reroutes all traffic for the branch through an alternate path until the active device recovers.
2. B. It automatically detects the failure, assumes the active role, and sends gratuitous ARP to minimize downtime for forwarding traffic. — đáp án hiện tại
3. C. It takes over, but all active sessions are immediately reset, requiring users to re-establish connections.
4. D. It notifies the other device to go in a diagnostic mode and logs the failure, requiring the controller to intervene and select standby device as a new forwarder.