Does tcp/ip v6 relate to the MAC address of the NIC?

IPv6 addresses are typically composed of two logical parts: a 64-bit (sub-)network prefix, and a 64-bit host part, which is either automatically generated from the interface's MAC address or assigned sequentially. Because the globally unique MAC addresses offer an opportunity to track user equipment, and so users, across time and IPv6 address changes, RFC 3041 was developed to reduce the prospect of user identity being permanently tied to an IPv6 address, thus restoring some of the possibilities of anonymity existing at IPv4. RFC 3041 specifies a mechanism by which variable over time random bit strings can be used as interface circuit identifiers, replacing unchanging and traceable MAC addresses.

No they would have the same IP addresses. Even if you have 2 or more computers hooked up to the same router/modem they would have the same IP address. The internet is a big place, it needs as much spare IP addresses as it can get, or it will run out. Did you know with IPv4 (which is what version of IP addresses we are using now) with IPv4 we only have 4.7 Billion IP addresses. And with dynamic IP addresses (where they stay the same.) the numbers of free IP addresses are dropping with more and more people that want dynamic IP addresses. For your information the opposite to dynamic IP addresses is static IP addresses which change every time your modem is turned on. Then your old one is ready to be recycled like a week later. But with IPv6 there is 140 Trillion Trillion Trillion possible IP addresses. I really don't see the earths population getting that high so thats like well enough. But the problem is that one day the world is going to switch to these IP addresses and they aren't compatible with the old ones. And everyone will need a new modem cause they only understand the old ones as well. Well have a nice day I'm out, bye:)

I do not think so. Tcp / Ip v6 does not relate to MAC address of NIC.

v6 can use DHCP.

the relationship with ip addresses and mac addresses does not change.