On Tue, 12 Nov 2002, Terry Lambert wrote: > 100mbit/s / 200kp/s = 500 bytes per packet > > ...and that an absolute top end. Somehow, I think the packets are > smaller.
Just for the record... Measurement studies[1] (and NLANR traces[2]) suggest that the average packet size on the Internet is between 400-500 bytes, depending on the backbone link you're monitoring. According to the same studies/traces, packet size distribution can be approximated relatively accurately by a tri-modal distribution, with about 40% ~40 to 44-byte packets, 20% ~572 to 576-byte packets, and 20% 1500-byte packets. The 20 remaining percent are more or less uniformly distributed between 40 and 4000 bytes. This is all of course a rather crude approximation (which is not helped by the fact I'm quoting these numbers off the top of my head - I'll post a correction if I'm blatantly wrong, but I think my memory still works ok), but it may be helpful to get a rough idea of the 'typical' packet size one can observe. The point is, 200 Kpps should be relatively close to what you should see on a 100 Mbps FDX link. [1] http://www.caida.org/outreach/resources/learn/packetsizes [2] http://pma.nlanr.net/PMA/ Best, -- Nicolas Christin Ph.D. Candidate, University of Virginia, Computer Science http://www.cs.virginia.edu/~nicolas To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
