1.4 Summary

In this chapter, we've given you the basic definitions of how things on the Web talk to each other, and the differences between the various types of client-server relationship. Based on these relationships, we've structured the topics in this book around the concepts of static, embedded, and dynamic applications, and have placed each of the web applications into one of these categories. There is also another category of structural components, things that aren't really web programming languages, but the components upon which these applications are built: Linux, Apache, MySQL, Perl. The next section of the book starts out building this structure.