Dissecting a URL
Web addresses are URLs, uniform
resource locator, an IP address+path
URLs are often redirected to other places;
e.g.   http://www.cs.washington.edu/100/     goes to
http://www.cs.washington.edu/education/courses/100/03wi/index.htm
protocol     = http://
Web server   = www
domain     = .cs.washington.edu
path     = /education/courses/100/03wi/      directories (folders)
file     = index
file extension   = .htm          hypertext markup language