SDN, or Software-Defined Networking, 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. By using SDN, organizations can automate network configurations and improve scalability. This technology supports dynamic adjustments to network traffic, enhancing performance and reducing downtime. Overall, SDN simplifies network management and helps organizations respond quickly to changing demands.