Due to all traffic in a system is transmitted to the core switch, it is required to have high reliability, high efficiency, manageability, and low latency. Generally, it adopts the managed switches in the core layer. Knowing the roles of core, aggregation, and access switches in contemporary network topology becomes essential to create effective and scalable networks. It provides stable and efficient data transmission for industrial automation, surveillance, and control systems. The core layer is an integral part in networking, but it is not requested in all. 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.