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The Application Controller (APPC, formerly abbreviated APP-C) manages and controls the life cycle of virtual applications, such as virtual network functions (VNFs), and their components.  APPC receives commands from external OpenECOMP internal ONAP components, such as MSOSO, DCAE, or the Portal.

A virtual application is composed of the following layers of network technology:

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An LCM command is sent as a request to the APP-C APPC using an HTTP POST request, or in a message on OpenECOMP's bus (DMaaP). For each request, the APP-C APPC returns one or more responses:

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For more information, see the OpenECOMP Application Controller (APP-C) API Guide.the APPC Documentation Repository