There is a conversion that is being made, and you don't have to worry about it. The equipment does it for you. Each and every IPv4 address has an IPv6 equivalent, Think of the set of IPv4 being a subset of IPv6.
That's about all of the mis-information I have on the subject.
Ed (modelamac)
I think I will just put an OUT OF ORDER
sticker on my head and call it a day.