How is Fault Tolerance configured in VMware vSphere?

Fault Tolerance in VMware vSphere is configured by enabling it on the virtual machine settings. This feature provides continuous availability for virtual machines by allowing a secondary VM to run in lockstep with the primary VM. When Fault Tolerance is enabled, a secondary VM is created and synchronized with the primary VM, ensuring that uninterrupted service is maintained even if the primary VM encounters an issue.

This process involves specific configurations directly through the VM settings, where administrators enable Fault Tolerance from the options provided for the VM. By doing so, the system takes care of creating and managing the secondary VM, maintaining synchronization without the need for manual intervention or additional configuration efforts.

The other options relate to aspects of VM management that do not contribute directly to enabling Fault Tolerance. For instance, changing network settings or modifying resource allocations affects the performance or connectivity of the VM but does not initiate Fault Tolerance. Creating a replica of the VM on a different host is part of backup strategies or disaster recovery plans, which differ from the live high availability provided by Fault Tolerance.