Turn a single 100 GbE QSFP28 port into four 25 GbE SFP28 links without adding optical modules. This direct attach copper breakout cable is built for environments that need clean port fan-out between aggregation and access layers, giving infrastructure teams a practical way to extend 25 GbE connectivity from a 100 GbE switch port. The breakout design helps reduce component count, power consumption, and thermal load compared with separate transceivers and patch cords. It is especially useful in high-density racks where cable management, port utilization, and predictable link behavior matter more than distance. By keeping the connection in copper, it supports short-reach deployments with fewer moving parts and less overhead. For teams standardizing on 25 GbE server connectivity while preserving 100 GbE uplink capacity, this cable offers a straightforward path to port breakout. It is a strong fit for leaf-spine fabrics, storage networks, and mixed-speed environments where every port must carry more value.