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

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

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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). The other part, the prefix (network) part of the address can't be embedded - otherwise routing becomes a nightmare - and quite impossible, as routing tables would become ginormous and would need to change as a device moves to a different network - less common in 1996, quite common in 2019 with all the mobile stuff.

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