Re: [DNA] Revised terminology section for DNAv4

[JinHyeock Choi <jinchoe@samsung.com>]

Dear Bernard

Let me check whether my understanding is correct, especially 
w.r.t. "link". 

> Attachment Point
>     The link endpoint on the link to which the host is currently
>     connected.
> 
> Link
>     A communication facility or medium over which network nodes can
>     communicate.  Each link is associated with a minimum of two
>     endpoints.  Each link endpoint has a unique link-layer identifier.

I'd like to apply the above to the specific example as below.  

Assume there are two 802.11 APs, AP1 and AP2 
and a router R on an ethernet segment as below. 
Also assume a host, H, is attached to AP1. 
(I don't remember how many times I used this one. :-))

                                 +----+ 
                                 |  R  | 
                                 +----+                    
                                   | 
                             +-----+--------+ 
                             |                       | 
                          +----+         +----+ 
                          |AP 1|         |AP 2| 
                          +----+         +----+       

                          +----+         
                          | H  |           
                          +----+         

Then 
1) There is only one link. 
2) AP1 and AP2 are link endpoints of the link.
3) BSSID of each AP is the unique link-layer identifier for link endpoint. 
4) AP1 is the Attachment Point of H. 

Right? 

If so, my concern is that the above may not be clear to the reader, 
I am afraid people may think there are two links in the above example. 
(Either I don't remember how many times this happened. :-() 
These are the words we use for "link" in CPL draft to prevent that. 

                          The term 'link' used in this document is as
   defined in RFC 2461 [1], which is a layer 3 definition.  NOTE that
   that definition is completely different than the definition of the
   term 'link' in IEEE 802 standards.

"Words" by themselves may not be enough for clear terminology 
definition. I think that it would help to provide an example like above. 
 
One more thing, I think it would better to use "Point of Attachment" 
instead of "Attachment Point". 

With "Attachment Point", we could not use an abbreviation because 
usually AP means 802.11 thing. This we belatedly found out while 
writing a draft. With "Point of Attachment", we can use "PoA". 
IEEE 802.21 WG uses the term "Point of Attachment" and its 
abbreviation "PoA" 

Thanks in advance for your kind consideration. 

Best Regards

JinHyeock