Keep short-reach 40 GbE connections tight, efficient, and ready for dense rack environments with this SonicWall 40GBASE-SR4 QSFP+ module. Designed for multimode fiber deployments, it uses an 850 nm optical interface to support high-throughput links between switches, aggregation points, and adjacent network equipment. For infrastructure teams, the value is in the fit: SR4 optics are built for short-distance connectivity where speed and port density matter more than long-haul reach. That makes this module a practical choice for top-of-rack and leaf-spine designs, especially when you want to preserve bandwidth without moving to more expensive long-range optics. Because it is a QSFP+ form factor, it slots into environments already built around compact, high-density transceiver architecture. The result is a cleaner cabling footprint and a straightforward path to 40 GbE expansion in environments that need consistent performance across many ports. Choose this module when you need a dependable optical component for short-reach 40 GbE links and want to stay aligned with the requirements of modern data center switching.