Application-defined networking (ADN) is a networking scenario in which applications have the ability to adapt network environments to meet their needs, rather than having resources allocated by the network.Content Continues Below
The ADN model relies upon software-defined networking (SDN), which removes network control from hardware and implements it in software instead to enable dynamic management of network resources.
In an application-defined networking environment, applications would be coded for interconnection to network software and infrastructure through application-program interfaces (APIs). Administrators would prioritize applications and determine constraints and applications would dictate their resource requirements within those constraints to optimize application delivery.
App-aware networking is a related concept in which intelligent networks maintain information about application status and requirements to optimize application delivery, while still retaining control of resource allocation and configuration.