Default file name
From Wiki @ Karl Jones dot com
A default file name is a file name which will be used by default, if no name is provided.
Default web server file names
Web servers typically support default file names.
When the server receives a request, and the request does not include a file name in the URL, the server looks for a default file. The server has a list default file names. The server checks the list to see if a default file exists; if it does, the server returns that file.
Typical default files names include:
