CHAPTER 27 World Wide Web
where the items in brackets are optional. Some of the more common service_schemes are:
The machine_name may be followed by a decimal port_number, separated from the machine_name by a colon, if something other than the default port number, 80, is used by the service.
The remainder of the address is the path, with subdirectories separated by "/" and ending with the desired file name or program. The latter may optionally be followed by a "?" and a keyword that can be used as an argument to the program. The specs for URLs can be found on: