Re: CSMA/CD

["David Nichols" <dnichols () amci com>]

You are talking about two different things. Ethernet, and TCP/IP.  Even
thought the combination of the two is the most common today, they are not
the same thing.  You can run TCP/IP over token ring, or IPX/SPX over
Ethernet.  Basically Ethernet (or Token Ring) are layers 1 and 2 while
TCP/IP (or IPX/SPX) are layers 3 and above.
You wouldn't re-write the TCP/IP stack, but the device driver for the
Ethernet card.  Even thatmay not work because the CSMA/CD may be done
entirely in hardware on the card

Working-on-my-CCNA-as-well-ly
David Nichols

----- Original Message -----
From: ". ." <ajfomania () hotmail com>
To: <Security-basics () securityfocus com>
Sent: Thursday, August 21, 2003 7:08 AM
Subject: CSMA/CD


> Hi there!
> I'm currently reading a CCNA book, and I've got some questions I can't
find
> an answer to.
> The Carrier Sense Multiple Access with Collision Detection checks if there
> is any traffic on the wire and then starts to send the host's data, if
> someone tryes to send at the same time, the sending host sends the
"trying"
> host a jam signal that would make the trying host to wait.If the trying
host
> get's 15 jam signals at one time, it times out.
>
> Some questions came up at this chapter. Is there any possibility to write
a
> program that sends jam signals to other hosts within the same broadcast
> domain until they timed out and died ? Does this mean that IF you where to
> write this program, actually needed to rewrite a part of the  tcp/ip
> protocol stack ? Isn't this a big issue?
>
> Sorry for my bad english..
>
> Best Regards: Fredrik Wessberg
>
> _________________________________________________________________
> Lättare att hitta drömresan med MSN Resor http://www.msn.se/resor/
>
>
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