What is the result of enabling vSphere Fault Tolerance on a VM?

Enabling vSphere Fault Tolerance on a virtual machine ensures high availability without downtime. This feature allows for the creation of a live shadow instance of the VM that is continuously synchronized with the primary VM. In the event of a hardware or host failure affecting the primary VM, the secondary instance can immediately take over, allowing the virtual machine to remain operational without experiencing any service interruption. This real-time failover capability is crucial for maintaining continuous service availability, especially in critical applications.

While the other options may seem appealing, they do not accurately describe the primary benefit of vSphere Fault Tolerance. For instance, enabling Fault Tolerance does not inherently increase the performance of a VM, nor does it necessarily improve resource allocation or backup capabilities. Instead, its core function is focused on ensuring that services remain accessible even in the face of failures.