[RINA] Question for all of you

Yuefeng Wang wyf at bu.edu
Sat Oct 2 13:05:04 EDT 2010

Hi John,
I think a layer is to provide unique services to the layer above it by 
taking certain actions within this layer, also by using the services 
from the layer directly below it.


Quoting John Day <jeanjour at comcast.net>:

> Lately, I have had inklings from discussions on various IETF lists
> that what I thought a layer was may be at odds with what much of the
> Internet thinks a layer is.
> So I thought I would ask all of you, what it was you were taught a
> layer was?  Could you define or otherwise characterize the concept
> of"layer"?  Not layer in RINA, but the concept of layer as you
> understood it prior to RINA (in case knowledge of RINA has changed
> your concept of layer).  Of course it would be interesting to know
> whether or not it has.
> This is not a trick question.  I suspect that there is a subtle
> difference and this is the only way I can think to test the
> hypothesis.
> Take care,
> John
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