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Delphi for .NET Developer’s Guide by Xavier Pacheco

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Web Technologies—How They Work

Generally speaking, the Web works on a client-server and stateless model. Communication occurs between a client and a server over the HTTP protocol.

HTTP Protocol Overview

HTTP stands for “Hypertext Transfer Protocol.” It is packet/text-based, and it defines how communication occurs between Web browsers such as Internet Explorer and Opera and Web Servers such as Microsoft Internet Information Server (IIS) and Apache. Details about HTTP can be obtained from RFC 2616 at ftp://ftp.isi.edu/in-notes/rfc2616.txt.

Under HTTP, browsers communicate with servers using a request/response model. The client, or browser, sends a request for a Web page to a Web server, which finds or dynamically creates the Web page and sends ...

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