> From: "Ben Simkin" <[EMAIL PROTECTED]>
> Date: Mon, 20 May 2002 15:32:20 +1000

> I would like to ask if it were possible to setup TCP/IP over USB
> (without an ethernet USB chip, or whatever they use)...
> 
> You see, I want to setup a 2-way satellite system, and AFAIK, the
> "modem" connects to the PC using USB, and the modem does the auth.
> 
> So, in theory, all that is needed is TCP/IP over USB, to communicate
> with the 

Ben, your misunderstanding is perfectly natural. Many people
do not realize that TCP/IP is not mapped on _ANY_ wire directly,
by the very nature of its architectural model. You DO NOT run
TCP/IP over Ethernet, you run it over a link level protocol.
In case of Ethernet, the protocol is relatively thin, with a
big chunk of ARP is sort of considered a core part. For other
links, such layer can be much thicker (for instance, ATM).
Thus, it is NOT possible "to run TCP/IP over USB" without
defining a certain mapping or protocol for this.

Now, since you have to define some protocol, why not to use
the a standard, such as CDC? There may be valid reasons in
other cases, but it seems that CDC is not too broken, and is
useable.

-- Pete

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