Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watmath!clyde!rutgers!nysernic!itsgw!batcomputer!cornell!uw-beaver!mit-eddie!ll-xn!ames!sdcsvax!ucbvax!ACC.ARPA!art From: art@ACC.ARPA.UUCP Newsgroups: comp.protocols.tcp-ip Subject: TCP performance Message-ID: <8709292321.AA29980@ucbvax.Berkeley.EDU> Date: Tue, 29-Sep-87 20:15:00 EDT Article-I.D.: ucbvax.8709292321.AA29980 Posted: Tue Sep 29 20:15:00 1987 Date-Received: Fri, 2-Oct-87 01:02:54 EDT Sender: daemon@ucbvax.BERKELEY.EDU Reply-To: Distribution: world Organization: The ARPA Internet Lines: 26 Hey Folks, Physics won't let us go infinitely fast!!! A practical limit is probably related to distance. Lets look at the facts: TCP has a maximum window size of 65535 bytes (16 bit field). Single satellite hop is approx. 1/2 sec round trip (approx. 90 Thousand miles). Thus for satellite, max. rate is about (65535*8)/(0.5) or 1.048 Megbit/sec. Coast to Coast should be about 30 times quicker, or about 30 Megbit/sec. Of course, this is for a single TCP session, multiply for number of concurrent sessions. Art Berggreen art@acc.arpa ------