What does enabling fault tolerance ensure for VMs?

Enabling fault tolerance in a virtualized environment ensures that the virtual machines (VMs) have continuous availability without any downtime. This feature allows for the creation of a secondary VM that is always in sync with the primary one, effectively mirroring its operations. In the event of a hardware failure or the primary VM crashing, the secondary VM takes over immediately without interruption to services. This capability is crucial for mission-critical applications that require high availability, as it provides resilience against system failures.

This continuous availability is a standout feature of fault tolerance, ensuring that users experience no downtime, thereby maintaining service reliability and enhancing overall business continuity. The other options do not directly align with the core benefits of fault tolerance. For instance, while greater network bandwidth and faster VM provisioning might enhance performance or efficiency, they do not directly pertain to the purpose of maintaining availability during failures. Similarly, reduced storage costs is not a direct impact of enabling fault tolerance, as this feature typically involves additional resource allocation to maintain the mirrored state of the VMs.