difference between SAP R/2 and R/3

Answer Posted / shamli francis

SAP R/2: is 2-tier architecture. In which all 3 layers [Presentation + Application + Database] are installed in two separate systems/server.
( Server One – Presentation , Server Two – Application +Database)

SAP R/3: is 3-tier architecture. In which all 3 layers [Presentation + Application + Database] are installed in three separate systems/server.
(server One -Presentation, server Two – Application, Server Three – Database)

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