A network rack has four servers and four switches with dual power supplies. Only one intelligent PDU is installed in the rack. Which of the following is the reason to add a second PDU?

Equipment with dual power supplies is designed for power redundancy. If both power supplies are connected to a single PDU, that PDU becomes a single point of failure. Adding a second PDU, typically connected to a separate power circuit, allows each power supply to draw from an independent source, ensuring that a failure of one PDU or its upstream power path does not interrupt service.

While intelligent PDUs offer monitoring, the primary reason to add a *second* PDU for dual-power-supplied equipment is to achieve redundancy in power delivery, not solely for monitoring capabilities which can often be achieved by one intelligent PDU.

Surge protection is a feature often found in PDUs, but adding a second PDU is not primarily for additional surge protection; it's for independent power paths to prevent a single point of failure.

Adding a second PDU increases the number of active components and does not inherently conserve electricity; power conservation is achieved through energy-efficient equipment and cooling, not by duplicating power distribution.