RPC stands for Remote Procedure Call. As its name indicates, it is a mechanism to call a procedure or a function available on a remote computer. RPC is a much older technology than the Web. Effectively, RPC gives developers a mechanism for defining interfaces that can be called over a network. These interfaces can be as simple as a single function call or as complex as a large API.
If you need to integrate multiple computing environments, but don’t need to share complex data structures directly, you will find that XML-RPC lets you establish communications quickly and easily.
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