Re: Analogy Units
"this means that in practice that there are 2^53 usable IPv6 addresses."
No, it means that IPV6 can handle 2^53 routable networks.
"What it means is that in practice, an IPv6 /56 prefix is the same as an IPv4 single address with NAT"
Sure. But it's now the routable address of a network.
"2^53 usable IPv6 addresses. This is 2 million times (2^(53-32) = 2^21) more than IPv4"
No, IPv6 can handle ~ 2 million times more routable networks. IPv6 can also handle ~ 2^85 times more addresses than IPv4.