https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClUcCAK

B chrisy042 is correct!

Promotion Hold Time The Promotion Hold Time is the amount of time the passive device (A/P) or active-secondary (A/A) waits when the active device is declared to be down. -- Hello Interval Hello packets are used to inform the other peer of the HA state information and are sent over the HA1 connection -- Heartbeat Interval Heartbeat monitoring uses ICMP pings to ensure that the HA1 connection (control plane) between the high availability members is operational. -- Preemption Hold Time The Preemtion Hold Time is set in minutes and is used to ensure that the higher priority firewall coming back up from a Suspend -- Additional Master Hold Up Time The Additional Master Hold Up Time is only applicable to the active device (A/P) or active-primary device (A/A) and is used to prevent a failover on the master device when both devices detect a link or path failure at the same time.

The firewalls exchange hello messages and heartbeats at configurable intervals to verify that the peer firewall is responsive and operational. Hello messages are sent from one peer to the other to verify the state of the firewall. The heartbeat is an ICMP ping to the HA peer. A response from the peer indicates that the firewalls are connected and responsive. Reference from EDU-210

"A "heartbeat-interval" CLI command was added to the election settings for HA, this interval has a 1000ms minimum for all Palo Alto Networks platforms and is an ICMP ping to the other device through the HA control link." https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClMaCAK

Correct answer is B The 'Heartbeat' message is an ICMP Ping that is sent to its peer every configured 'Heartbeat Interval' https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClUcCAK

Answer is B

On the 1/23/24 test