What are presentation, application and database servers in
SAP R/3?

Answer Posted / sree

The application layer of an R/3 System is made up of the
application servers and the message server. Application
programs in an R/3 System are run on application servers.
The application servers communicate with the presentation
components, the database, and also with each other, using
the message server. All the data are stored in a
centralized server. This server is called database server.

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