A network engineer is deciding whether to use stateful or stateless failover when configuring two...

Stateful failover means that the connection state information is replicated from the active ASA to the standby ASA, so that in the event of a failover, the connections are preserved and do not need to be reestablished. Stateless failover means that the connection state information is not replicated, so that in the event of a failover, the connections are dropped and need to be reestablished by the end hosts. Stateful failover provides a smoother transition and less disruption to the network traffic, while stateless failover is simpler and less resource-intensive. References:

Failover for High Availability - Cisco

Failover Types / ASA Failover Addresses / Failover Requirements | Cisco …