What benefit does controller-based networking provide versus traditional networking?

Controller-based networking, a key aspect of Software-Defined Networking (SDN), centralizes the network's control plane, enabling administrators to manage, configure, and monitor all connected network devices from a single, unified interface.

While SDN can improve security posture, its primary benefit is not exclusively an 'added layer of security to protect from DDoS attacks' compared to traditional methods.

Controller-based networking typically *separates* the control plane from the data plane, with the controller managing the control logic and network devices handling data forwarding, rather than combining them on a single device.

Controller-based networking is a shift in network architecture's control and management, not a direct change from a two-tier to a three-tier physical network topology.