What happens when a host configured with vSphere HA goes down?

When a host configured with vSphere High Availability (HA) goes down, the virtual machines that were running on that host are automatically restarted on different hosts within the same cluster. This behavior is a key feature of vSphere HA, which is designed to minimize downtime and ensure business continuity by automatically managing the availability of virtual machines.

vSphere HA continuously monitors the hosted virtual machines and their respective hosts. If a host fails and is no longer operational, vSphere HA recognizes that the virtual machines on that host are not running, and it takes action to restart those virtual machines on other available hosts within the cluster that have sufficient resources. This process is seamless and helps maintain service availability without requiring manual intervention.

By utilizing this automatic failover capability, organizations can enhance their disaster recovery strategies and ensure that critical applications continue to run, even in the event of a host failure. Thus, the correct answer emphasizes the resilience built into the vSphere HA feature, which facilitates the rapid recovery of virtual machines without data loss.