Possible Duplicate:
websites urls without file extension?
I'm not sure what it is exactly but after looking at sites like Facebook and others I often see urls like http://www.youtube.com/results?search_query=examplequery
My question on this is sites like Facebook and others are written in PHP but don't always use the .php extension on the end like youtube's search for example instead of results.asp or results.php it just uses /results? and then adds the query string on the end.
Can anyone tell me are these using PHP/ASP.Net or is it an EXE file like a cgi program? I'm confused.
Thanks in advance for anyone who can clear this up for me.