Deliver 100 GbE connectivity where short reach and high port density define the design. This SonicWall 100GB-SR4 QSFP28 module uses an 850 nm optical interface for multimode fiber deployments, making it a strong fit for data center uplinks, leaf-spine fabrics, and adjacent-rack interconnects. SR4 optics are built for parallel short-reach transport, which is exactly what many modern switching architectures need. Instead of paying for long-distance capability you do not need, you get a transceiver optimized for high-throughput links inside the rack row or across nearby network tiers. The QSFP28 form factor keeps the footprint compact while supporting 100 GbE speeds, helping preserve switch density as bandwidth demands rise. That matters in environments where every port, every cable path, and every watt of rack space has a cost. Choose this module when you need a clean, direct path to 100 GbE over multimode fiber and want an optical component suited to enterprise and data center fabrics that depend on short-reach performance.