1) what is the use of WebAs?
2) All SAP Components can run in SAP WebAs?
3) SAP System means SAP WebAS ?
4) XI Components like IR,IDand SLD..etc reside on SAP WebAS...like this other SAP Netweaver Components like EP Components also reside in 2 stacks of SAP WebAS?
5)How the XI Message flows from sender Business system to Receiver Business system via WebAS ? plz give example?
6) What is Difference between SAP System and SAP WebAS and 3rd Party Systems?