Subj : Echo Traffic
To   : Ben Carpenter
From : Richard Town
Date : Tue Mar 19 2002 09:08 am

 -=> Quoting Ben Carpenter to Richard Town <=-

 RT> Yes, ports.  What are they, how do they work, where in the great
 RT> scheme of things does port addressing occur, what governs the role of
 RT> each port number?  Is there a list of commonly applied port numbers and
 RT> why does say port 23 invariably do one job and another a different job?
 RT> What is the role of 8080?
 BC> As for just how they work I do not know, but as I was once told they
 BC> are somewhat like a room with different doors.  Every person uses a
 BC> different door to go in and out of.  No that is not just quite right
 BC> either.  Doctors use one door, school teachers use another door, and
 BC> truck driver use yet another door etc etc.

So your analagy means Telnet is always on door #23, and HTTP on door #80,
etc?  If so, how come it's configurable?  What's the convention?  I can't
go on just doing that coz everyone else does it!

 BC> I know that is a simple
 BC> explanation but that is the way it was once explained to me and I
 BC> really have not studied it enough to learn more than that or to know
 BC> if this is totally correct.

Not that the textbooks are much help either.  New Riders MCSE for 70-068
only talks about comms ports, and the earlier covering 70-58 doesn't
even have Port listed in its index!

Richard

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