Which feature must be enabled to use vSphere Fault Tolerance?

An administrator has applied a Service 2 patch after taking a snapshot. The administrator then realizes that a Service 1.5 patch should have been applied before the Service 2 patch.

Refer to the exhibit:

Which series of actions should be taken to manage this issue?

An administrator has noticed an increase in network latency when

powered-off virtual machines are migrated.

Which VMkernel adapter can the administrator use to reduce this latecy?