Defining the Remote Procedure Call Paradigm

Remote Procedure Calls (RPCs) enable a program on one computer to call another program running on a remote computer. RPCs are supported in many frameworks, like Microsoft’s DCOM or Object Management Group’s CORBA definitions. They are also known as Remote Method Invocations (RMIs) in the Java programming environment.

All of these models require server-side programs listening for incoming requests. The server-side program supporting PHP web applications is an HTTP listener. Also known as the HTTPD service or HTTP daemon, it is a background process. HTTP daemons listen for incoming Uniform Resource Locators (URLs), like the Apache and IIS web application servers. When they receive a URL, they check their ...

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