These three terms are similar but slightly different:

  • A flow is a uni-directional transfer between a pair of (IP Address, Port) using the same layer-3 protocol, type of service, and input interface.
  • In InterMapper Flows, a session is a bi-directional transfer between a pair of (IP Address, Port). It is the sum of the flow from A to B, plus the flow from B back to A.
  • Other NetFlow products define a conversation different ways, either as a session, in the InterMapper Flows sense, or as a uni-directional flow.

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Last Modified On: February 22, 2019