When you bring a page to your screen, you'll see the whole page or, if the content is extensive, only a portion. Often the portion you see is the beginning of the page, but sometimes a link brings you content from the page's middle or end. For example, the beginning of a page might include a table of contents that links each chapter title to its respective content further down the page. Yet another kind of link doesn't display a page at all. Whereas a URL identifies a server's page location on the Internet, an Internet address identifies a user's mailbox location.
Addresses use lowercase letters without any spaces.
The three-letter suffix in the location name helps identify the kind of organization operating the server.