Provide 100 GbE optical connectivity between compatible QSFP28-equipped network devices over multimode fiber. The TP-Link Omada SM9110-SR4 uses the 100GBASE-SR4 interface, which carries Ethernet traffic across four parallel optical lanes. Its QSFP28 form factor fits the high-density 100 GbE port format used on network switches and other compatible equipment. SR4 is a short-reach parallel-optics specification for multimode fiber infrastructure. The module connects through an MPO-style parallel-fiber interface rather than a duplex connector, making connector type and fiber plant topology important when selecting patching components. Four-lane optical transmission distinguishes SR4 modules from single-lane optical formats while retaining a 100 GbE host-side connection. Use this transceiver for short optical runs inside data rooms, equipment rows, or building network spaces where compatible multimode parallel-fiber cabling is already present. It is suited to uplinks between 100 GbE switching layers, aggregation equipment, and high-throughput server or storage infrastructure. Select it when both endpoints provide compatible QSFP28 ports and the installed cabling supports 100GBASE-SR4 parallel optics.