A Remote Function Call (RFC) is a call to a function module running in a system different from the calling-system. The remote function can also be called from within the same system (as a remote call), but usually the calling-system and the called-system will be in different systems.
An RFC helps to take care of the following communication:
- Communications between two independent SAP systems.
- Client-server communications between an external Client and an SAP system acting as the server.
- Client-server communications between an SAP System acting as the Client and an external server.
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