IP is short for Internet Protocol, which assigns an address for each Internet users, just like every mobile user is identified by a number.

IP是互联网协议的缩写，它分配给每个用户一个地址，就如每个手机用户是通过号码来识别的。

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Internet Protocol addresses are the unique number sequences allocated to every website.

互联网通信协议地址是分配给每个网站的唯一编号顺序。

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The Internet Protocol defines an IP address as a 32-bit number.

互联网协议将IP地址定义为一个32位的编号。

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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

In a world where a growing number of devices have Internet protocol addresses, building security into these systems has never been more important.

FORBES: The Biggest Cybersecurity Threats of 2013

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