[e2e] Are we doing sliding window in the Internet?

Joe Touch touch at ISI.EDU
Sun Jan 7 08:28:02 PST 2007

Simon Leinen wrote:
> Joe Touch writes:
>> FYI,Internet MSS's are usually in the 500-byte range in general. A
>> 5KB file would take 10 packets and be over by the 4th round.
> Um, the Internet MSS is usually 1460 bytes, except where it is hacked
> to between 1300 and 1400 bytes to avoid issues with broken Path MTU
> Detection in the presence of links with an MTU slightly smaller than
> 1500 (mostly ADSL links).
> Packets around 500 bytes have become quite rare on the Internet today.


'better connected' sites show larger packet sizes (show in the USC
traces), but that smaller packets are still used, and that the average
size depends on the protocol (CSL traces).


Joe Touch
Sr. Network Engineer, USAF TSAT Space Segment

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