Abstract
As a new network concept, SDN subverts the vertical structure of traditional network integration, decoupling the control plane and data plane of the network, replacing distributed control with centralized control, and transforming the closed network into an open one. Programming platform to promote the innovation of network applications, in order to deeply study the application of SDN, we put forward the concept of "SDN+", which combines SDN with different network scenarios to provide a new paradigm for network applications. The article analyzes the architecture of SDN and investigates the application of SDN in different scenarios.
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