NAT for IPv6: ULA, NAT64, and IPv6 Transition Mechanisms
IPv6’s 128-bit address space — roughly 340 undecillion addresses — removes the core reason IPv4 needed NAT in the first place. But NAT hasn’t disappeared entirely from the picture; it’s just doing a different job now. Instead of conserving scarce addresses, IPv6-era NAT exists almost entirely to bridge the gap during the transition period —...
