I will foccus on these distinctions.

• Static (X)HTML pages. No need for server scripting lik asp or php.
• Static XML driven sites, like an XML CMS. No need for server scripting lik asp or php. XML driven sites can be great, since you can transform the same datasource (XML files) to different formats, HTML, PDF, WAP (for wireless applications), other XML formats like RSS and Atom etc. by using XSLT (Extensible Stylesheet Transformation Language). That makes XML driven sites very flexible. These technologies can of course be combined with the technologies mentioned below. That is the future and what I call web-, internet- or net 2. I am sure some webmasters are already writing all their sites in XML and trasforming it to (X)HTML by using XLST if / when needed. Note, you can get problems with older browsers with XML driven sites depending on how you transform the source file(s).
• Dynamic sites based on browser scripting in JavaScript. No need for server scripting lik asp or php.
• Dynamic database driven sites. Then you need a server scripting language like asp or php.
• Web applications driven by an AJAX engine. Then you need to combine asynchronous (browser) JavaScript with serverscripting in asp, php or .NET

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