A method and apparatus provide improved cache coherency and more effective caching operations without placing an undue burden on network links. A proxy receives a request for a resource and then, depending on information in the proxy cache, generates a resource request for transmission to a resource...http://www.google.com.hk/patents/US6330561?utm_source=gb-gplus-share專利 US6330561 - Method and apparatus for improving end to end performance of a data network
