IPv6: frequently asked questions

Here are answers to some common questions about IPv6.

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What is IPv6?

Internet Protocol version 6 (IPv6) is a set of protocols that computers use to exchange information over the Internet and over home and business networks. IPv6 allows for many more IP addresses to be assigned than IPv4 did. IPv6 is supported in this version of Windows.

What does an IPv6 address look like?

An IPv6 address has eight groups of hexadecimal characters (the numbers 0–9 and the letters A–H) separated by colons—for example, 3ffe:ffff:0000:2f3b:02aa:00ff:fe28:9c5a. The leading zeroes in a section can be suppressed—for example, 3ffe:ffff:0:2f3b:2aa:ff:fe28:9c5a.

Why do some IPv6 addresses contain double colons?

A double colon indicates that part of the address containing only zeroes has been compressed, to help make the address shorter. For example, this IPv6 address: fe80:0:0:0:2aa:ff:fe9a:4ca2 could be written like this: fe80::2aa:ff:fe9a:4ca2.

How can I enable IPv6?

Follow these steps:

  1. Open Network Connections by clicking the Start button Picture of the Start button, and then clicking Control Panel. In the search box, type adapter, and then, under Network and Sharing Center, click View network connections.

  2. Right-click your network connection, and then click Properties. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

  3. Select the check box next to Internet Protocol Version 6 (TCP/IPv6).