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The advantage of IPv6 is that can multiple addresses. This means that good way to organize network is to have machines use local provider addresses to access the Internet.

Then have ULA addresses for internal network. Those will be routed with tunnels and VPNs. That separates accessing the internet from internal network, and means that don't need to have routable address space.

The only people who would need own address space have data centers and routers.




> Then have ULA addresses for internal network

Except that ULAs don't really work. They are less prioritized than GUAs.




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