IP address classes vs CIDR (was Re: Reviving ARPAnet)

Dennis Boone drb at msu.edu
Thu Jan 18 13:23:59 CST 2018

 >     > which would respond to ARP requests for non-local addresses and
 >     > reply with the router's MAC address (on that interface),
 >     > specifically in order to make classful-only hosts work on a
 >     > CIDR network.

 > Yeah, Proxy ARP (an early RFC here:

You all talk about Proxy ARP in the past tense for some reason. :)


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