On 11/12/24 10:53, Lew Wolfgang wrote:

You don't send an email to an IP address. You send it to an account on a server. Also, with IPv6, a LAN has a gazillion addresses (2^{^64} or 18.4 billion, billion).

Why do you need such a massive subnet? Security through obscurity?
I'd rather have separate independent subnets with a DMZ. I don't want
my light bulbs to ssh in to my desktop.

I've always wondered why IPv6 is /64 by default? Seems like a waste.

I suspect they wanted to avoid running out of addresses in the foreseeable future (before the heat death of the universe 😉 ).

The address is large enough to contain the MAC address, if desired. You may recall the old Novell Netware, which had a 16 bit network address and 48 bit host address, usually the MAC address. As for /64, it's just splitting the 128 bit IPv6 address in half.