6. Typically, the default page of a domain is refer to index.* file . As an example,
the default page when browse to http://abc.com will be refer to http://abc.com/index.htm usually.
Actually the default page can be set to other than index.* by using DirectoryIndex directive in .htaccess file.
If you want to change your own DirectoryIndex to either add a different filename, shorten the list,
or change the order of the list, just create a file named .htaccess in the directory where you want
this behavior to occur. Inside the .htaccess file, put a single line beginning with DirectoryIndex
followed by the list of filenames that you want Apache to serve first when a directory has been
requested, like so: