Maintain high-speed connectivity where rack-to-rack distance is short and link reliability matters. The AddOn Networks QSFP-100G-SL4-AO is a Cisco-compatible QSFP28 transceiver designed for 100 GbE short-reach applications over multimode fiber. Its 850 nm optical design and MPO connector support dense switch-to-switch and switch-to-server interconnects in data center environments where clean cable management and predictable performance are essential. This module is a strong fit for infrastructure teams standardizing on 100G uplinks without moving to more expensive long-reach optics. The 30 m reach is well suited to top-of-rack and adjacent-rack deployments, helping preserve budget for the parts of the network that need it most. For teams that value compatibility, repeatability, and straightforward deployment, this optic delivers the right balance of reach and density for modern switching architectures. Use it where short-reach 100G transport is enough, but link quality and vendor alignment still matter. It is a practical choice for enterprise refreshes, expansion projects, and high-density environments that need dependable multimode performance.