What does vSphere HA do in terms of providing availability for virtual machines?

vSphere High Availability (HA) is a feature designed to enhance the availability of virtual machines (VMs) in a virtualized environment. When a host fails, vSphere HA automatically detects the failure and re-establishes the VMs that were running on that host by restarting them on other hosts within the cluster. This ensures minimal disruption to services and maintains business continuity.

The process begins with vSphere HA monitoring the hosts in the cluster and the VMs running on them. If a host becomes unresponsive or fails for any reason, vSphere HA will automatically schedule the affected VMs to restart on another available host, thereby reducing downtime. This is essential for organizations that rely on high availability for their critical applications and services.

The other options do not accurately convey the purpose of vSphere HA. Enabling low latency between VMs relates more to networking and performance rather than availability. Monitoring VMs for performance thresholds falls under different management aspects, such as performance monitoring tools, rather than HA specifically. Creating backups of VMs is a separate function typically managed by backup solutions, rather than the high availability features of vSphere.