Software-Defined Networking (SDN) What is Software-Defined Networking (SDN)? Software-Defined Networking (SDN) is an approach to network management that uses software-based controllers to dynamically control and optimise network resources. Explanation SDN decouples the control plane from the hardware, allowing administrators to centrally manage and configure the network, enhancing flexibility and scalability. Practical Example of SDN A data centre implements SDN to streamline its network management, enabling real-time adjustments to handle fluctuating traffic loads.