A traditional web server serving static files is the most elementary strategy in the ControllerTaxonomy---it amounts to having no dynamic behaviour at all. The use of static files is mentioned here for completeness.
A web server has access to a file system hierarchy containing HTML (and other) files. A URL directly maps to a path in this hierarchy, ultimately leading to a file. Upon an HTTP request, the server merely sends the file denoted by the request URL back to the client browser.