Hi, I would just like to know. When downloading a file from a site say for example a link like so: http://host1.example.com/test.zip and the file has a size say 300kb (and timestamp 2006/01/01 ?) and then downloading the same file from another (mirror) site say http://host2.example.com/test.zip with the filesize also at 300kb and the same timestamp Will squid redownload the file? Or will it be "clever" enough to say that I've already downloaded that file, I'll send you the cached version? Do timestamps matter? Does squid just check the filesizes and filenames? Thanks Nolan