A method and system are disclosed for efficiently matching incoming packets to previously forwarded outgoing packets within a network node to ensure a response received by a network node corresponds to a previously forwarded request. The network node receives an outgoing packet including state information...http://www.google.com.tw/patents/US7206862?utm_source=gb-gplus-share專利 US7206862 - Method and apparatus for efficiently matching responses to requests previously passed by a network node