Subj : Packet Vs Circuit Switch
To   : Bo Simonsen
From : Andy Ball
Date : Mon Oct 18 2004 09:54 am

Hello Bo,

  AB> Out-of-order packet reception springs to mind.

  BS> Hm. Please explain, not familear with that expression.

On a circuit-switched link (such as a dial-up call between my modem and yours) 
all the data sent from my end to your end take the same route and arrive in the 
same order that they were sent.  On a packet-switched network (such as the 
Internet), it is possible for packets to take different routes to reach you, 
and for a packet to arrive ahead of one that was sent before it was (arriving 
out of order).

Thinking about it though, Telnet works over TCP which almost certainly 
re-orders packets that it receives in the wrong order before passing them up to 
Telnet, so although it's a valid difference between circuit-switched and 
packet- switched networks, it's sort of irrelevent from Telnet's point of view. 
 :-)

- Andy Ball

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