What is Internet addressing?
URL stands for Uniform Resource Locator. URLs are used to identify specific sites and files available on the World Wide Web.
The structure of a URL is: protocol://server.subdomain.top-level-domain/directory/filename
Not all URLs will have the directory and filename.
Two examples:
http://www.healthyway.com/exercise/mtbike.html
gopher://gopher.state.edu/