What is SDN?

Software-Defined Networking (SDN) is a network architecture approach that enables the network to be intelligently and centrally controlled, or 'programmed,' using software applications. This helps operators manage the entire network consistently and holistically, regardless of the underlying network technology. SDN decouples the data plane (forwarding data) from the control plane (routing decisions), centralizing network intelligence and programmability. It's commonly used to improve network agility, reduce operational costs, and enable innovation by providing a flexible and programmable network infrastructure.