| K. Clay, H.W. Braun, and G. C. Polyzos, \Internet trac ow proling," Nov. 1993, http://www.caida.org/outreach/ papers/itf.html. |
....are not really counters at all: the timestamps of the rst packet and most recent packet in a ow. There are four primary methods of expiring ows: xed timeout, adaptive timeout, protocol based, and time bucketed. These methods may also be combined to di ering extents. With a xed timeout method [34], a ow is expired when some xed time period has elapsed since a packet was seen matching this ow (e.g. waiting 60 seconds after seeing the most recent packet) Adaptive timeout [35] is like xed timeout, but the time period is dynamically chosen for this ow based on its previous behavior ....
K. Clay, H.W. Braun, and G. C. Polyzos, \Internet trac ow proling," Nov. 1993, http://www.caida.org/outreach/ papers/itf.html.
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