You can use nat64 to talk to legacy networks. Ipv6-only networks (with nat64 or 464xlat etc) are becoming increasingly popular. There is also this new concept c

You can use nat64 to talk to legacy networks. Ipv6-only networks (with nat64 or 464xlat etc) are becoming increasingly popular. There is also this new concept called "ipv6-mostly network" that is getting rolled out: https://www.ietf.org/archive/id/draft-ietf-v6ops-6mops-02.html https://www.ietf.org/archive/id/draft-ietf-v6ops-6mops-02.ht...