To utilize vSphere Fault Tolerance, which feature must be enabled?

To utilize vSphere Fault Tolerance, the feature that must be enabled is vSphere High Availability (HA). vSphere HA is a critical component designed to minimize downtime in a virtualized environment. When enabled, it allows for automatic recovery from hardware failures by restarting virtual machines on other hosts within a cluster. This capability is essential for vSphere Fault Tolerance, which provides continuous availability for virtual machines by creating a live shadow instance of a VM on another host. In the event of a failure, Fault Tolerance ensures that operations can continue without interruption, thereby enhancing the overall resilience of applications running in the virtual environment.

The other options refer to features that serve different purposes within VMware infrastructure. vSphere Distributed Resource Scheduler (DRS) manages load balancing and resource allocation across hosts, but it does not have a direct impact on Fault Tolerance. Similarly, vSphere Replication focuses on replicating virtual machines for disaster recovery but is not a prerequisite for enabling Fault Tolerance. vSAN provides storage solutions and high availability for VMs through storage policies, but it does not relate to the Fault Tolerance feature directly. Therefore, enabling vSphere HA is crucial for making use of vSphere Fault Tolerance effectively.