A first server computing apparatus receives a reply from a second server apparatus, the reply includes an indication of the total amount of time that the second apparatus has taken to generate the reply. The first apparatus determines the total amount of time that has elapsed between the sending of the...http://www.google.com.tw/patents/US6457041?utm_source=gb-gplus-share專利 US6457041 - Client-server transaction data processing system with optimum selection of last agent
