An aggregation switch is a network device that consolidates traffic from multiple access switches, wireless access points, or other edge devices and forwards it to core switches or routers. It also enables easy expansion by simply adding more fiber or network switches. Long-distance installations often require fiber optic cables to connect different sites because of. An Aggregation or "Top-of-Rack" switch is designed to connect everything in a rack at high speeds, then have an even bigger pipe out to the rest of the network. The Pro Aggregation does this with it's SFP28 25Gbps ports. Amounts or summary statistics are used in place of atomic data rows, which are often collected from several sources when data is aggregated.