Forum Moderators: phranque
URLs have meaning only on the Web, and folders and files have meaning only within the server file system. A server's main job is to translate URLs used on the Web into filepaths, so that it can retrieve (or generate) the content for the requested URL.
As mod_rewrite on Apache or ISAPI rewrite on IIS make clear, there is no fixed relationship between a URL and a server filepath.
Unless your server is mis-configured, no user-agent on the Web is ever aware of the file structure on your server's disk.
Jim