The IANA recognized this possibility early on, and in 1999, Internet Protocol version 6 (IPv6) was born.

IANA可能很早就意识到了这一问题，在1999年，互联网协议第6版(IPv6)诞生了。

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Today's Internet was built largely on the IPv4 or Internet Protocol version four, first introduced in 1980.

Curt Hopkins / 2010年5月19日 3:49 PM 今天的互联网主要是基于IPv4，或者叫互联网协议版本4（Internet Protocol version four）建成的，于1980年首次被引入。

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For instance, you can build PHP to interoperate with the new Internet Protocol version 6 (IPv6) Internet addressing scheme.

例如，您可以构建PHP，以便与新的网际协议版本6 (IPv6) Internet寻址方案进行互操作。

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Internet Protocol version six, or IPv6, is an Internet addressing system designed to expand the number of available IP addresses.

WHITEHOUSE: Office of Science and Technology Policy Blog

This expansion is necessary because the current number of addresses under Internet Protocol version four (IPv4) is gradually being exhausted.

WHITEHOUSE: Office of Science and Technology Policy Blog

Cisco Systems is helping enterprises prepare for the migration to IPv6 (Internet protocol version 6) from IPv4, which most of the world runs on today.

FORBES: Uncle Sam Gives Cisco A Boost With New Internet Protocol