What is the primary function of vSphere High Availability (HA)?

The primary function of vSphere High Availability (HA) is to ensure that virtual machines (VMs) automatically restart on another host within the cluster in the event of a failure. When a host goes down due to hardware failure or any other unexpected issue, HA automatically detects this failure and triggers the restart of impacted VMs on a functioning host. This capability significantly enhances the availability of applications running on virtual machines, minimizing downtime and maintaining service continuity.

In contrast, load balancing of virtual machines refers to distributing workloads evenly across multiple resources, but it is not a core function of HA. Resource management involves the allocation and optimization of resources such as CPU and memory but does not directly relate to high availability. Monitoring of network traffic pertains to analyzing data packets for performance or security reasons but does not play a role in the high availability and recovery aspects that HA focuses on.