Where Do IPv6 Addresses Come From?

With IPv4, IP addresses come from one of two places: either you type in the IP address yourself (static IP addressing) or you use the Dynamic Host Configuration Protocol (DHCP, also called dynamic IP addressing). With IPv6, addressing works very differently. Instead of one IP address, you can have up to three IP addresses on a single network card, although two is by far the most common.

When a computer running IPv6 first boots up, it gives itself a link-local address, IPv6’s equivalent to IPv4’s Automatic Private IP Addressing (APIPA) address. Although an APIPA address can indicate a loss of network connectivity or a problem with the DHCP server, computers running IPv6 always have a link-local address. The first ...

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