Encrypting confidential data stored on the server and performing regular backup will not make the server fault
tolerant.
Fault tolerance is the ability to continue work when a hardware failure occurs on a system. A fault-tolerant
system is designed from the ground up for reliability by building multiples of all critical components, such as
CPUs, memories, disks and power supplies into the same computer. In the event one component fails, another
takes over without skipping a beat.
Answer options A, C, and D are incorrect. The following steps will make the server fault tolerant:
Adding a second power supply unit
Adding one more same sized disk as a mirror on the server implementing cluster servers facility