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Application delivery as a service (ADaaS) refers to web-delivered services that focus on providing application functionality to an audience. Although some of the specific techniques may differ, the common focus is on allowing customers to fully use applications on some particular network.
In some ways, application delivery as a service suffers from some of the complicated semantics of today's IT industry. Application delivery as a service is a subset of the general idea of software as a service – software as a service involves offering a given software package through the cloud or the internet, as opposed to on a physical medium such as a compact disc.
Application delivery as a service is more about assisting with the deployment of an application somewhere in a network. Experts often describe application delivery as a service as including elements of software-defined networking and automating the deployment of an application in a network. Generally speaking, application delivery as a service provides new models for resource pooling and elastic scaling of systems.