A routing mechanism, service or system operable in a distributed networking environment. One preferred environment is a content delivery network (CDN) wherein the present invention provides improved connectivity back to an origin server, especially for HTTP traffic. In a CDN, edge servers are typically...http://www.google.com.hk/patents/US7274658?utm_source=gb-gplus-share專利 US7274658 - Optimal route selection in a content delivery network
