Split one 100 GbE port into four 25 GbE links without adding transceivers on both ends. This 5 m QSFP28-to-4xSFP28 direct-attach copper cable is designed for fanout in high-density switching environments where port economics matter as much as throughput. Use it to connect a 100 GbE switch uplink to four 25 GbE servers, adapters, or downstream devices in the same rack or adjacent rack. The passive copper design keeps the path short and deterministic, which is exactly what you want for leaf-spine access layers, aggregation blocks, and lab environments that need clean signal integrity without the cost and power draw of optical modules. For teams standardizing on 25 GbE server connectivity, this cable helps preserve switch port flexibility while avoiding unnecessary optics inventory. It is a practical choice when you need a tidy breakout path, low operational overhead, and a cable length that fits structured rack layouts.