It is possible to look at the addresses of two web sites claiming to be linked to see if they are similar. If they are coming from the same computer, the first part of the address will be the same.
http://www.thesite.com/main.html http://www.thesite.com/cyberquack/information.html
Look at the two addresses.
If you can chop one or both of them down until they say the same thing, then they both come from the same computer.
Made by HDA and CHIQ & Showme Multimedia Ltd