There are several types of physical network devices, such as routers, switches, hubs, and modems, that connect and control traffic in a network. A logical network device, on the other hand, is a virtual or software-defined component, such as a virtual firewall, a virtual local area network, or a virtual router, that operates over the physical infrastructure. Especially in cloud and virtual environments, the move from physical to logical devices offers greater flexibility, scalability, and cost-efficiency. The evolution of this technology enables dynamic, modern networks to be controlled centralized and managed more easily.