Answer Posted / syed mahboob feroz ahmed

Hi,

The Presentation,Application and DataBase Servers in SAP
R/3 represent SAP Architecture and there are 4 types of SAP
R/3 Architecture.
1) SAP/R3 Tier-1 Architecture.
2) SAP/R3 Tier-2 Architecture.
3) SAP/R3 Tier-3 Architecture.
4)SAP/R3 Multi-Tier Architecture.

SAP/R3 Tier1 Architecture is where all the 3 Servers are
present in a Single Server.(Presentation,Application and
DataBase Server).
SAP/R3 Tier2 Architecture is where you
find 2 Servers Presentation and Application Server in One
System and DataBase Server on One System.
SAP/R3 Tier3 Architecture is where you
find 3 Servers Presentation and Application,and DataBase
Server on 3 Different Systems.
SAP/R3 Multi Tier Architecture is where
you find Internet WebServer along with
Presentation,Application and DataBase Server and it is also
Called as SAPWEBAS Application Server.

Whole together it is called as SAP Architecture.

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