Q:
I have searched all over the net to see any mention from any body of standards (iso[osi], ieee, rfc) and none have mentioned ARP as a layer 3. However, nonstandard bodies such as online encylopedias, random students, some small networking/IT companies mention that ARP is layer 3.
But, I am like you...when I want the answers, the real answers, I go to the places that create the standards.
A:
Ohhh yes we finally get to this graphic that you brought out. If you look at the graphic closely, ( here is the site it is at, www.cisco.com/warp/public/535/4.html ) click on the graph and it will open into an expanded pdf version. Something interesting is noticable ARP and RARP actually are riding above the LLC sublayer and if you notice the divisional lines it actually shows the row they are on as residing in both The Network Layer and the Data Link Layer. I guess Cisco didn't wan't to get in that debate either. Print it out and look at it I did. Come on, you know that wasn't the purpose of that graphic, it wasn't meant to be detailed for addres resolution. The paper as it states at the top is focused on routing.
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