29 Apr
2023
29 Apr
'23
9:39 p.m.
On 2023-04-29 16:39, Scott Allen wrote:
Also, forget about address classes. They've been obsolete for over 30 years. That said, sticking with class sized masks and matching the network numbers for class based networks tends to simplify addressing and make things less confusing.
That's only true because people have learned a lot of bad habits with IPv4. Also, originally, all IPv4 addresses had the same size subnet, /8. As that allowed only 256 networks, address classes were introduced, to provide more, smaller networks. Then even that proved inadequate, so Classless InterDomain Routing (CIDR) was introduced which is what we've been using for decades. https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing