A URL which specifies only the location of the site, and not any particular files or directories within it, such as http://webcom.com/~webcom/userid/.
The file that is presented when a "default" URL is accessed can have any of the names listed below. The following list also shows the order of "precedence," meaning that if you have both a welcome.html file and an index.html file within the directory, the system will load the welcome.html file, because it is higher on the list below.