SDN Controllers

SDN (Software-Defined Networking) controllers are central programs that manage and coordinate a network's devices, such as switches and routers. They act like a conductor, directing traffic flow based on real-time data, policies, and objectives. Instead of each device making independent decisions, the controller provides a unified, programmable interface that allows for flexible, efficient, and automated network management. This centralized approach simplifies network configuration, improves performance, and enhances security, making it easier to adapt the network to changing needs without physical hardware changes.