Build dense 25 GbE server and storage access layers with 48 SFP28 ports supporting 1, 10, and 25 GbE Ethernet. Eight QSFP28 interfaces provide higher-speed 40 or 100 GbE connections for spine, aggregation, or inter-switch links. Extreme Networks 8522-48Y-8C-DC-R concentrates high-port-count access and uplink capacity into a fixed data-center switching platform. The 48 SFP28 ports suit hosts, storage nodes, and top-of-rack connections that need a migration path from 10 GbE to 25 GbE without changing the access-switch role. The eight QSFP28 ports reserve higher-bandwidth interfaces for uplinks, fabric links, or aggregation paths, reducing the need to consume access ports for upstream connectivity. Optical and direct-attach cabling can be selected to match the required link medium and distance. This configuration includes an AC power supply and B-to-F fan airflow. B-to-F airflow moves air from the port side toward the rear of the chassis, aligning the switch with rack layouts that place network cabling at the cold-aisle side and exhaust toward the hot aisle. Select this configuration when the required port mix is 48 SFP28 access interfaces plus 8 QSFP28 high-speed interfaces, with AC input power and the specified airflow direction.