Reply to post: Re: why did IPv6 use 128bit Hex?

We are absolutely, definitively, completely and utterly out of IPv4 addresses, warns RIPE

Roland6 Silver badge

Re: why did IPv6 use 128bit Hex?

>IPv6 embedded the MAC address only in the device/host part of the address (the lower 64 bit).

Yes, one of the ideas floated in the 90's was that the lower 64 bit was sufficiently large for every device to have their own unique (and burnt in) static address - and given the size of the IPv6 address space why would you want to bother with assigning your own lower 64 bit address components...

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