In this chapter you will learn . . .
The World Wide Web (WWW) relies on a number of systems, protocols, and technologies all working together in unison. Before learning about HTML (Hypertext Markup Language) markup, CSS styling, JavaScript, and PHP programming, you must understand the key web and Internet technologies and protocols applicable to the web developer. This chapter describes crucial web protocols and concepts, such as domain names, URLs, browsers, and HTTP headers. While you may not remember everything fully after a first reading, this chapter is worth coming back to later as concepts in subsequent chapters build on these practical and fundamental ideas.