The dialog box lets you specify a printer, select pages to print, choose number of copies to print, plus other selections. If the Security icon is unlocked, as it is on the graphic on the previous page, then you are not in a secure server environment. If the icon is locked, you are. The Stop icon will halt a web page download. Browsers require a URL in order to display information that is contained on a Web server.
Most hosts also have names, which are a lot easier to remember than numbers are.
These names may be multiple parts separated by dots. The best way to decode an internet name is from right to left. The rightmost part of a name is called its zone. The next part is the name of the company and the part to the left of the company name is the particular machine within the company. There could also be a two digit code to the right of the zone that you won't normally see for a US address.