Riser cards are used to re-route PCIe slots to different orientations for density or multi-slot access.

• A. A management network device.
• B. A cable management arm.
• C. Re-route PCIe slots to different orientations for density or multi-slot access.
• D. Provide embedded storage for hypervisors.

Answer: (C)

Riser cards re-route PCIe connections to a different orientation inside a server, allowing devices to be mounted in tight spaces or side-by-side for higher density. They take the PCIe lanes from a motherboard slot and present a new connector in a different angle or plane, so GPUs, NICs, or other expansion cards can be installed in configurations that wouldn’t fit with a straight, vertical slot. This directly supports density and multi-slot access in dense server chassis.

The other options describe unrelated components: a management network device handles administrative access, a cable management arm just guides cables, and embedded storage for hypervisors provides storage rather than re-routing PCIe signals.