On 6/28/20 5:00 AM, R.Wieser wrote:
> Its the other way around: what can't you do with a serial connection
> that you could do with an ethernet one.

The biggest one is speed.

There are some other more esoteric things that can be done (much much
much easier) on Ethernet.

Ethernet can easily be point-to-multipoint supporting more than two
computers.  RS-232 can't do that.  (Yes, other serial specifications
can, but they aren't on the Pi.)

> You wouldn't be able to portscan just any other 'puter in search of
> a vunerable service.

Depending on how you use the serial interface, yes, you can port scan
other computers across the serial connection.  SLIP and PPP come to
mind.  Have you ever used the Internet over a dial-up-modem?  ;-)

> Doubt no more. As an example:
>
https://www.sjoerdlangkemper.nl/2019/03/20/usb-to-serial-uart/#chip-differences

I still doubt it.  I remember seeing high single / low double digit Mbps
on UARTs in the past.

The fact that the UARTs are hanging off of a USB interface doesn't
change the fact that they are still a UART.

> Yep.  Something called an "USB Bridge".   But as I read that it might
> be supported by the OS as just another network interface it would do
> exactly what I don't want. :-|

It will depend on the type / mode of USB communications that is used.

Yes, USB Gadget /can/ appear as a network interface.  USB Gadget can
appear as a /serial/ interface.  (This underlying serial / USB
functionality is how USB-to-RS-232 adapters work.)  Linux has the
ability to pick /which/ gadget mode(s) are used.  As such, you can make
a USB connection look like a serial connection and not a network connection.



--
Grant. . . .
unix || die

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