Nathaniel wants to improve the fault tolerance of a server in his datacenter. If he wants to ensure that a power outage does not cause the server to lose power, what is the first control he should deploy from the following list?

An uninterruptable power supply (UPS) should be Nathaniel's first priority. Ensuring that power is not disrupted during an outage and can be maintained for a short period until alternate power like a generator can come online is critical, and a UPS can provide that capability. A generator alone will take longer to come online, resulting in an outage. Dual power supplies can help to build resilience by allowing multiple power sources and avoiding issues if a power supply does fail, but that is not the focus of the question. A managed power distribution unit (PDU) provides remote management and power monitoring but will not prevent power loss in an outage.