[e2e] trading acks...TRACKS

Joe Touch touch at ISI.EDU
Fri Dec 1 15:29:42 PST 2006

Christian Kreibich wrote:
> Hi Detlef,
> On Sat, 2006-11-25 at 17:49 +0100, Detlef Bosau wrote:
>> just a very spontaneous, perhaps stupid, question: What is the 
>> difference between "packet symmetry" and the well known principle of 
>> packet conservation here? Aren´t these ideas at least quite similar?
> the packet conservation principle states that in a steady-state TCP
> flow, a new packet is not to enter the network before another one has
> left

That "packet conservation principle" already has a (perhaps not as
well-known, but certainly worth knowing) name: 'isarithmic', and was
proposed by Davies in 1972.

"Packet symmetry" appears to be per-NIC isarithmic.

The "packet conservation principle" is single-protocol isarithmic.


Joe Touch
Sr. Network Engineer, USAF TSAT Space Segment

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