Chapter 1: How the Web Works

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This chapter introduces the World Wide Web (WWW). The WWW relies on a number of systems, protocols, and technologies all working together in unison. Before learning about HTML markup, CSS styling, JavaScript, and PHP programming, you must understand how the Internet makes web applications possible. This chapter begins with a brief history of the Internet and provides an overview of key Internet and WWW technologies applicable to the web developer. To truly understand these concepts in depth, one would normally take courses in computer science or information technology (IT) covering networking principles. If you find some of these topics too in-depth or advanced, you may decide to skip over some of the details here and return to them later.