So is IP - which version are we talking about? The out-of-address-space v4 that wasn't future-proof enough to conceive of more than 4 billion computers? Or th

So is IP - which version are we talking about? The out-of-address-space v4 that wasn't future-proof enough to conceive of more than 4 billion computers? Or the reinvented ipv6 that seems to have gone way too far in the other direction (and not just in terms of address size)?