In this chapter, I've focused on some core Internet technologies, including the use of sockets and core Internet protocols. I've discussed the main idea and shown a few examples of using the mail and HTTP protocols. You can find many more examples that use the Indy components in the demos written by their developers (which are not installed in Delphi 7).
After this introduction to the world of the Internet, you are now ready to delve into two key areas: the present and the future. The present is represented by the development of web applications, and I'll explore the development of dynamic websites in the next two chapters. I'll focus first on the old WebBroker technology and then move to the new WebSnap architecture. Then, in Chapter 21, I'll discuss IntraWeb. The future is represented by the development of web services and the use of XML and related technology, discussed in Chapters 22 and 23.