On Apr 17, R. Chris Ross wrote > > I am quite new at the world of IP networks and have been doing > some testing on a Debian 1.2 system and Free BSD. Last night I ran a > test as described in one of the ethernet FAQs by running FTP on a > file that was ~2.5Meg the rate came out at 1.09M/sec. From what I > can tell this is quite good for 10 Base2 since this indicates a rate > around 8Mbit/sec of data not including overhead. With no tuning at > all it is supprising to get proformance on this order or am I faking > my self out?
The numbers above do not look right: The theoretical throughput on 10base2 is about 1.183 Mbytes/sec. This number assumes some rather ideal conditions: one ACK for 22 large 1460 byte segments, no collisions, the minimun inter-packet gap of 9.6 ms, 64k windows, and no delays for either sender or receiver transitions (that is no TCP/IP delays). throughput = (22*1460bytes)/(22*1538+84bytes) * (10,000 bits/sec)/(8bits/sec) = = 1,183,667 bytes/sec -- Ioannis Tambouras [EMAIL PROTECTED], West Palm Beach, Florida Signed pgp-key on key server. -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .