If memory serves me right, Mark Allman wrote: >> Thank you for your reminder. Actually, I understand you and >> RFC 2018. What I really concern is how wide support (and being enabled >> by default) SACK has obtained. For we do not always transfer data >> between hosts running FreeBSD and maintained by network expert. > > SACK is quite widely deployed. See: > > Alberto Medina, Mark Allman, Sally Floyd. Measuring the Evolution of > Transport Protocols in the Internet. ACM Computer Communication > Review, 35(2), April 2005. > http://www.icir.org/mallman/papers/tcp-evo-ccr05.ps
What a trip, I just read this paper on the train to work this morning. FWIW, I thought this was a well-done study on an interesting topic. A question and a nitpick: Did you try doing any stack fingerprinting to get some idea of the mix of TCP/IP stacks among the servers / clients you examined? The percentages in the commentary on Table 5 in the text (second column of p. 41 in the CCR printing) are sometimes one-off from the percentages actually shown in Table 5. It took me several tries to get through the "huh?!?"-ness of this, though the lack of caffeine in my bloodstream at the time might have been a contributing factor. :-) Cheers, Bruce.
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