用途

私有IP无法直接被互联网所访问，因此，相对于公网IP地址，它更加安全。

私有IP常被用于家庭，学校和企业的局域网。对于分配公有IP不足的地方，可使用网络地址转换（NAT）方式转发封包。

私有IP种类

IPv4

更多资料：IPv4

在IPv4里的私有IP被定义在RFC 1918

IPv6

更多资料：IPv6

在IPv6里的私有IP被定义在RFC 4193

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RFC的定义参考

RFC 1918 – "Address Allocation for Private Internets"

RFC 2036 – "Observations on the use of Components of the Class A Address Space within the Internet"

RFC 2050 – "Internet Registry IP Allocation Guidelines"

RFC 2101 – "IPv4 Address Behaviour Today"

RFC 2663 – "IP Network Address Translator (NAT) Terminology and Considerations"

RFC 3022 – "Traditional IP Network Address Translator (Traditional NAT)"

RFC 3330 – "Special-Use IPv4 Addresses" (superseded)

RFC 5735 – "Special-Use IPv4 Addresses"

RFC 3879 – "Deprecating Site Local Addresses"

RFC 3927 – "Dynamic Configuration of IPv4 Link-Local Addresses"

RFC 4193 – "Unique Local IPv6 Unicast Addresses"

RFC 6598 - "IANA-Reserved IPv4 Prefix for Shared Address Space"

^IANA IPv4 Special-Purpose Address Registry. www.iana.org. [2016-08-21]. 

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