Which VMware technology provides failover support for VMs?

VMware High Availability (HA) is the technology specifically designed to provide failover support for virtual machines (VMs). In a VMware environment, HA is implemented at the cluster level and continuously monitors the health of VMs and ESXi hosts. If a host that runs one or more VMs fails, HA automatically re-starts those VMs on other healthy hosts within the cluster. This process minimizes downtime and ensures that services remain available, delivering a seamless experience to users.

In contrast, features like vMotion facilitate the live migration of VMs between hosts without downtime, but they do not provide failover capabilities. vSAN, on the other hand, is an integrated software-defined storage that pools disk space from multiple hosts, enhancing storage performance and availability, rather than directly addressing VM failover. VMware Tools is a set of utilities designed to enhance the performance and manageability of VMs but does not involve failover functionality. Thus, VMware HA is the correct answer as it specifically addresses the need for VM failover in the event of host failures.