The examples give good insight into what makes up a web application in different tier architectures. The next part of the book covers XML, wireless applications and serving graphics. Sample applications are built using XML and XSL stylesheets in combination with JSP and servlets. It is very easy to create a wireless application using WAP with JSP and servlets. The author writes a complete application, which shows off how easy this is.
Advanced techniques are the topic of the last part of the book.
This way we can create a single file, which contains all the necessary files and code for an application. This makes it very easy to deploy an application. Since JSP 1.1 we can extend the tags with our own defined tags. How to create new tags and put them in a web application is covered by the author. The web is not restricted to a single country, but is world wide.