On Tue, Jul 15, 2014 at 6:01 PM, Bryan J Smith <b.j.sm...@ieee.org> wrote:
> I.e., IANA > ... > assigned > ... > IPv4 blocks by Class. > So while you cover CIDR by default, you still need to point out the IPv4 > A, B and C classes. > And I forgot the major point here ... Because of how IANA assigned IPv4 blocks and how the authorities are used, this is _why_ in -arpa .add r zones (reverse DNS records) are required and how they work, on the IPv4 classes. ;) So _everyone_ needs to know Class A, B and C if they are going to remotely do any DNS administration. So it's best to introduce them with their CIDR for IPv4. -- bjs
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