Which of the following allows for a connection of devices to both sides inside of a blade enclosure?

A midplane sits between the two halves of a blade chassis, exposing connectors on both its front and rear faces so that blade servers inserted from the front and I/O, power, or fabric modules inserted from the rear all connect through a single central board. This dual-sided connectivity is the defining architectural characteristic of a midplane and is what differentiates it from a traditional backplane.

An active backplane includes signal-regenerating or switching circuitry but does not specifically describe a board designed to connect devices on both sides of an enclosure.

A passive backplane provides simple passive electrical traces for connections but is a single-sided connector bus, not a dual-sided midplane.

A management module provides out-of-band administration and monitoring for the blade chassis but is not responsible for physical device interconnection on both sides.