Build a high-density leaf or aggregation layer with 48 25 GbE SFP28 interfaces for server, storage, and inter-switch connectivity, plus 8 100 GbE QSFP28 interfaces for fabric uplinks. The port layout concentrates high-speed connections in a fixed data center switching platform, allowing architects to match 25 GbE access links with 100 GbE paths toward spine, core, or aggregation infrastructure. The 8522-48Y-8C-AC-R configuration includes an AC power supply and B-F fan direction. B-F denotes back-to-front airflow: air enters from the back of the chassis and exits at the front. This matters in rows where rack thermal design places equipment intake at the rear and requires exhaust toward the cold-aisle or front-facing airflow path. Its 48Y and 8C interface mix distinguishes this configuration through 48 SFP28-class 25 GbE ports and 8 QSFP28-class 100 GbE ports. Use the 25 GbE interfaces where high port density is needed for hosts or storage nodes, while reserving the 100 GbE interfaces for higher-bandwidth uplinks and fabric connections. The fixed port configuration, AC power, and defined airflow orientation make this switch suited to deployments where interface count and thermal direction must be selected before rack installation.