What is synchronous and asynchronous message in SAP PI system?

1.	What is synchronous and asynchronous message in SAP PI system?
Answer» Synchronous message is defined as message contains both the request-response part. Asynchronous message is defined as message contains either request or the response part only.

Answer»

Synchronous message is defined as message contains both the request-response part.

Asynchronous message is defined as message contains either request or the response part only.

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