What does the vSphere High Availability (HA) feature enable for virtual machines?

The vSphere High Availability (HA) feature specifically enables the automatic restart of virtual machines (VMs) on different hosts after a failure. When a host fails, vSphere HA detects the failure and automatically restarts the affected VMs on other hosts within the same cluster, minimizing downtime and improving system resilience. This ensures that critical applications remain available and can quickly recover without manual intervention.

In contrast, the other options address different aspects of VMware's capabilities. Migration of virtual machines across different hosts pertains to vMotion, which allows for live migration of running VMs without downtime. Snapshot management is related to creating point-in-time copies of VMs for backup and recovery purposes, but it does not handle automatic restarts after failures. Data deduplication and data recovery are features generally associated with storage capabilities rather than directly with VM high availability. Therefore, the specific function of vSphere HA focuses solely on ensuring VMs remain operational by restarting them on accessible hosts after a failure occurs.