Web Forms :: How To Get The Pretty URL With An ASPX Pages

How do i get the pretty URL with an ASPX pages. I have listed a couple links below and their associated print page url. As you can see it resembles the Class instantiation method of declaring object but is used for a webpage with its extension.

I was wondering if this method can be used or if this is a URL rewrite to mask all the querystrings and sub directories being referenced. I remember doing stuff like this when i was working on a UNIX system using the .htaccess file to mask effective query
string being shown. I believe they called it a Clean URL, i maybe wrong as it has been well over 8 years since i dealt with the Unix .htaccess file and massaging urls with it.

For instance, look at the MSDN site pages:

http://msdn.microsoft.com/en-us/library/system.servicemodel.actionnotsupportedexception.aspx

Now when you want to print it:

http://msdn.microsoft.com/en-us/library/system.servicemodel.actionnotsupportedexception(printer).aspx

Now you select the same page but choose a different framework than its birth:

http://msdn.microsoft.com/en-us/library/system.servicemodel.actionnotsupportedexception(VS.100).aspx

and the print URL:http://msdn.microsoft.com/en-us/library/system.servicemodel.actionnotsupportedexception(VS.100,printer).aspx

As you can see they are not visually passing query strings but more like Class parameters. Is this just a simple URL rewrite after the page is loaded so the user doesnt see the query string information?