Support high-density 100 Gigabit Ethernet links with a QSFP28 SR4 transceiver built for multimode optical networking. The AddOn F5-UPG-QSFP28-SR4-AO is hot-swappable and uses an MPO connector, making it a practical fit for environments where rapid replacement and clean cable management matter. This module is aimed at data networking and optical network deployments that depend on short-reach SR4 connectivity. Its QSFP28 form factor helps preserve switch port density while delivering the throughput expected in modern aggregation, spine, and high-performance server connectivity designs. For teams standardizing around 100 GbE, the value is in the details: a compact optic, multimode support, and a lifetime warranty that helps reduce lifecycle friction. It is the kind of component that fits well in production networks where downtime is expensive and compatibility is non-negotiable.