What equipment is necessary to guarantee server service during a power disruption?

To ensure server service during a power disruption, an uninterruptible power supply (UPS) is essential. A UPS provides immediate backup power from its internal battery when electrical input is lost, enabling connected servers and devices to continue operating without interruption. This is crucial for maintaining services, preventing data loss, and allowing for the orderly shutdown of systems if the power outage persists. The UPS also typically includes features such as power conditioning to protect equipment from fluctuations in the electricity supply.

While other options like a data backup system, power distribution unit, and surge protector have their roles in overall server management and energy management, they do not specifically address the immediate need for power continuity during outages. A data backup system is important for restoring data after incidents, a power distribution unit helps in organizing and managing power to various devices, and a surge protector protects equipment from voltage spikes, but none of these can provide the instant power retention required during a power failure like a UPS can.