> IPv6 has SO many special networks. Network. Public. Multicast. Link local.
IPv4 has those exact same ones: link-local (169.254/16), multicast (224/4), public, private (RFC 1918).
* https://en.wikipedia.org/wiki/Reserved_IP_addresses
IPv6 is (IMHO) simpler: 2001::/32 and anything else (either link-local (fe80), multicast (ff00), and ULA (fc)). So either it starts with a "2" or an "f".
but not on the same computer. and the application does not have to figure out which one it has to use.