Re: CSMA/CD

From: David Nichols (dnichols_at_amci.com)
Date: 08/21/03

  • Next message: pablo gietz: "Security Basic question event log" 
    To: ". ." <ajfomania@hotmail.com>, <Security-basics@securityfocus.com>
Date: Thu, 21 Aug 2003 14:12:21 -0400

    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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    > -------------------------------------------------------------------------- 

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>
>
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  • Next message: pablo gietz: "Security Basic question event log"

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