Thank you all for valid perspectives. Yet my original question (I had on
mind but perhaps not clearly worded) is still unanswered. I will
rephrase it:
Does ARP operates at network interface layer or internet layer of TCP/IP
protocol stack?
Just forget anything else (in particular OSI concepts) - concentrate on
TCP/IP. To my opinion every protocol must belong somewhere (otherwise
the whole layering concept would be useless and could not work), it
cannot be an "interface" (it is a layer protocol, not an interlayer
protocol within a single system).
No matter whether IETF currently bothers about its own layering system -
at the beginning they for sure managed to fit the pieces in the puzzle
(I mean protocols) according to their original, simple
4-layer-architecture.
Sorry for being soooo persistent ;-)
Rita
Dr Rita Puzmanova wrote:
>
> Hi all,
>
> Trivial yet fundamental question. I have seen ARP described as part of
> the network (internet) layer so many times that I have started to
> believe it belongs there (although I know well that it operates "as if"
> the Layer 2 protocol - as per OSI RM). Now I have eventually come across
> Doug Comer's statement: "It's part of the network interface layer."
>
> I should not ask where the truth is but still I will. That would mean
> quite a lot of books are incorrect in this (including Cisco materials).
>
> Rita
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=8605&t=8335
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