What does SDN Software Defined Networking do? What are the applications within the enterprise?

Software-defined networking (SDN) consists of a variety of networking technologies that are flexible and agile, and it is a programmable network that changes the settings of the network based on deployment requirements or subsequent needs, primarily through OpenFlow technology. Unlike traditional networks, software-defined networking (SDN) separates the control plane of network equipment from the data plane, so enterprises can modify the network architecture like upgrading and installing software to meet the needs of enterprises for adjusting, expanding, or upgrading the entire network structure, while the underlying hardware such as switches and routers do not need to be replaced, saving a lot of cost at the same time, the iterative cycle of network architecture will also be The network architecture iteration cycle will also be greatly shortened.