Sustain 400G uplinks and breakout paths without adding transceivers, patch panels, or unnecessary conversion points. This Dell/NVIDIA compatible active optical cable maps one QSFP-DD 400G interface to four 100G QSFP56 endpoints, giving infrastructure teams a clean way to extend high-bandwidth connectivity across short-reach rack and row deployments. At 10 m, it fits the distances that matter inside modern data halls: top-of-rack to end-of-row, adjacent rack interconnects, and structured breakout between switches and accelerators. The AOC design helps preserve signal quality over the full run while keeping cable management simpler than discrete fiber assemblies with separate optics on each end. For teams standardizing on Dell and NVIDIA platforms, this cable supports a direct compatibility path for dense Ethernet fabrics where predictable performance and fast deployment are worth more than commodity cabling. TAA compliance also makes it suitable for procurement environments with sourcing requirements. When the design goal is to keep 400G infrastructure compact, orderly, and ready for scale, this cable delivers the right physical layer without excess complexity.