RFC is the call of a function module that is running in a
different system . It is used to maintain the communication between SAP or
NON-SAP system with SAP system.
There are 4 types of RFC present in SAP –
1.Synchronous System :- For direct
combination between different system and between SAP system. Both system should
be active at that time.
2.Asynchronous System :- For direct
combination between different system and for parallel processing of selected
task. System can be active or not.
3.Transaction RFC :- The main problem
with asynchronous rfc is that when we send
data in it, same message can be send one or more time. So removing this type of
inconsistency we send an id with that data. With the help of this id receiving
of same message more than 1 time will be rejected.
4.Queue RFC :- It is extension
of TRFC. That type of RFC maintain a queue. It also ensure that individual
steps are processed in the sequence.
5.Background RFC :- It is successor to TRFC and QRFC.
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