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[lwip-users] Re: [lwip] IP forming an Ethernet frame.
From: |
Pablo Bleyer Kocik |
Subject: |
[lwip-users] Re: [lwip] IP forming an Ethernet frame. |
Date: |
Thu, 09 Jan 2003 02:16:18 -0000 |
If I understood your question correctly... Ethernet is to Ethernet what
IP is to IP. IP lives in the network layer (main concern is routing stuff
at the global scale) while Ethernet is at the data link (how do I send
stuff reliably from this computer to the next one). Strictly, an Ethernet
packet wraps an IP message completely. You could deliver an IP datagram
from one computer to another typing in one while reading the bytes from the
screen of the other (you would be the data link, then).
However, in an Ethernet network commonly an association exists between
Ethernet addresses and IP addresses, and that's why the *ARP* protocols
exist. But then again, this is only meaningful at the link layer.
Cheers.
At 04:04 PM 18-06-2002 -0400, you wrote:
>Hi All,
>
>I wanted to onw thing. Which layer forms the ethernet frame. Is it the
>functionality of IP layer or the IP layer just passes an IP datagram to
>the layer 2 which wraps that datagram in an ethernet frame. Please guide
>me, I need this info badly.
>
>Amit
>
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PabloBleyerKocik / "Personally I don`t understand the motivation
pbleyer / to build robots in human form since humans are
@embedded.cl / so available and inexpensive." -- Lou Boyd
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