Power Redundancy

Correct Answer: Dual power supplies with UPS

A dual power supply with UPS ensures that if one power supply fails or experiences an issue, the other can seamlessly take over, providing uninterrupted power. Furthermore, the UPS provides backup power during outages and prevents damage from power fluctuations, making it the most robust option.

Correct Answer: Connecting to separate power grids

Connecting to separate power grids would provide the most power redundancy for a data center. If one power grid fails, the data center can still operate using the other power grid. Adding more UPS devices or using battery-powered generators can provide temporary power during an outage, but do not provide the same level of redundancy as separate power grids. Connecting all devices to a single power grid would not improve redundancy, as a failure of that grid would impact all devices.

Correct Answer: Second power supply and UPS

To maximize power redundancy for a server with essential business services, the best option is to add a second power supply and an uninterruptible power supply (UPS). A second power supply ensures that if one power supply fails, the server can continue running on the redundant power supply. A UPS provides battery backup power in case of a power outage, allowing the server to safely shut down or continue running for a limited time. Adding only a second power supply does not protect against power outages, while adding only a UPS does not provide redundancy if the single power supply fails. A surge protector alone does not provide the necessary level of power redundancy for a critical server.