Hi, My name is Mark Schall. I am a Master student at Michigan State University. I am working with a group, trying to work with HTTP caches. We were wondering if, in general do HTTP caches work by caching data based on the IP addresses or by the URI of the HTTP request. It seems that using IP addresses would be the most secure means of caching, but the URI seems logical for multiple server websites. Thank you for any help, Mark Schall Michigan State University CSE Graduate Student