SAP NetWeaver AS ABAP Administration · RFC, CPI-C & Network Connectivity

What is a trusted-system RFC relationship, and where is it maintained?

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Where are RFC connections defined, and why can any program reuse a destination?

What is an RFC, and which two communication styles does it support?

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In an RFC, what are the client and the server, and on which interface is RFC built?

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What is CPI-C, and how is it implemented in SAP?