Sometimes a URL specifies a page, sometimes it does not:
If a page is not specified, as in the second example above, the web server will need to know how to respond to the browser request.
A web server should be configured to search for a default page to respond with, and the web developer should always include a default page in every folder on the website.
A web server can be configured with a list of default pages to look for. The standard page names are: