Understanding and Navigating the World Wide Web
HTTP (HyperText Transfer Protocol) HTML (HyperText Markup Language)
or
(Uniform Resource Locator)
URL is the address to a Web Page on the Internet.
protocol: http
host computer name: www
second-level domain name: geocities
top-level domain name: com
directory name: Area51, 5322
file name: www.html
.com = commercial, business, and personal pages
.edu = research and educational institutions
.gov = governmental and military pages
.org = organizations