What is the list of default documents for an index page, in order of priority?

When a visitor goes to your site by typing in a directory, such as www.your-domain.com/shop/, your server has a list of file extensions that it will serve as the index page for that directory.  If you have several index files in there, there is a specified order that it will serve those files – first looking for one file extension, then the next, then the next, until it finds a valid index file with a valid extension.

The priority list for Linux/Apache servers is:

1. index.cgi
2. index.pl
3. index.asp
4. index.html
5. index.html.var
6. index.shtml
7. index.php
8. index.php3
9. index.htm
10. default.htm
11. default.asp

The priority list for Windows IIS servers is:

1. index.cgi
2. index.pl
3. default.asp
4. index.asp
5. index.html
6. index.html.var
7. index.shtml
8. index.php
9. index.php3
10. default.htm
11. index.htm
12. iisstart.htm
13. default.aspx
14. index.aspx