What does vSphere Fault Tolerance provide for VMs?

vSphere Fault Tolerance is designed to provide continuous availability for virtual machines (VMs) in the event of a host failure. This technology allows a VM to be mirrored onto another physical host, creating a secondary instance that is fully synchronized with the primary VM. When the primary VM's host fails, the secondary VM can take over immediately, ensuring that there is no interruption in service. This feature is vital for mission-critical applications, as it addresses the need for high availability without downtime, even in instances where hardware issues occur.

While other options speak to various benefits, such as improved scalability or performance, these are not the primary focus of Fault Tolerance. Its core function is to maintain operational continuity and minimize disruption, particularly due to host failures.