Methods for identifying network traffic flows
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United States of America Patent
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N/A
Issued Date -
Dec 4, 2003
app pub date -
Mar 31, 2003
filing date -
Mar 29, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides methods for identifying and tracking data packets across a network. Specifically, network monitoring devices are configured to identify particular data packets or traffic flows at different points in a network by conversation fingerprinting. Conversation fingerprinting involves creating a unique identifier based on an invariant portion of one or more data packets in a traffic flow. An equivalency test is then performed between two identifiers from different monitoring devices to determine if the same data packet is received at two or more network monitoring devices. In order to reduce the probability of mismatches, additional heuristics may be applied based on additional attributes of the data packet or conversation. If a match occurs, then the timestamps of the two identifiers are compared to determine the point-to-point network transit latency between the two network monitoring devices.
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