If you occasionally see a mysterious "80" on the name of a Web server that is handling your request for Web pages, this is a bit of technical stuff showing through when perhaps it shouldn't. A Web server sits and waits for requests from clients (such as your Web browser). Most Web servers are set up to "awaken" and respond to requests from clients whose Uniform Resource Locator (URL) requests include "port 80" as part of their information. When you see the "80" showing up in the server address at the bottom of your screen, all it means is that the server uses the usual default port number. (You don't usually see this because some servers can be set up so that this number is not visible to the browser user.)
Also see well-known port numbers.