> […] and write the standard such that all valid IPv4 addresses are also valid IPv6 addresses? You mean RFC 4291's ::ffff:0:0/96? * https://www.rfc-editor.org

> […] and write the standard such that all valid IPv4 addresses are also valid IPv6 addresses? You mean RFC 4291's ::ffff:0:0/96? * https://www.rfc-editor.org/rfc/rfc4291.html#section-2.5.5 https://www.rfc-editor.org/rfc/rfc4291.html#section-2.5.5 * https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml https://www.iana.org/assignments/iana-ipv6-special-registry/... * https://en.wikipedia.org/wiki/Reserved_IP_addresses#IPv6 https://en.wikipedia.org/wiki/Reserved_IP_addresses#IPv6