A device that passively monitors arriving and departing data packets on one or more networks, correlates arriving data packets with departing data packets, and calculates a latency estimate based on the confidence of the correlation. The device detects and copies data packets arriving at a network device...http://www.google.es/patents/US6868069?utm_source=gb-gplus-sharePatente US6868069 - Method and apparatus for passively calculating latency for a network appliance
Method and apparatus for passively calculating latency for a network appliance
