Software-Defined Networking (SDN) is a modern approach to managing computer networks. It separates the network's control plane, which makes decisions about traffic, from the data plane, which forwards that traffic. This separation allows for more flexible and efficient network management, enabling administrators to easily adjust network resources and policies through software. With SDN, network configurations can be automated and centralized, reducing the need for manual intervention. This leads to improved network performance and easier integration of new technologies. Overall, SDN enhances the ability to respond to changing network demands and simplifies the management of complex networks.