Sitting at the top of the hierarchical model, core switches interconnect distribution layer switches and provide high-speed data transfer across network segments. Unlike access or distribution switches, a core switch is optimized for Layer 3 performance, modular. It is a powerful backbone switch in the center of the network core layer, which centralizes multiple aggregation switches to the core and implements LAN routing. In these switches, the data routed and switched. A core switch is a high-capacity network switch that functions as a network's backbone or core layer. It's responsible for accurately routing communication among layers and departments of different sections. Simply put, it's the kingpin that keeps your network humming.