Support for IPv6

The transition from IPv4 to IPv6 networks is well under way, but it still has a long way to go. Windows 10 fully supports IPv4 networking, of course, but the supply of available IPv4 addresses has officially dried up. The use of network address translation (NAT) allows homes and small businesses to share a single IPv4 address, but the widespread use of NATs makes location-based services less effective and degrades many applications that rely on direct communication. As the Internet of Things takes hold and every device within range has its own direct connection to multiple networks, the problems only become more acute.

To remedy these issues, IPv6 was created with unimaginable scale, offering 3.4 × 1038 available IP addresses (enough for every living human to have billions of personal, unique IPv6 addresses). In addition to offering an immense address range, IPv6 also offers new security features such as IPsec, which provides security at the packet level. During the transition from IPv4 to IPv6, dual-stack topologies are being implemented. This allows devices to be configured with both IPv6 and IPv4 addresses.

Modern versions of Windows (beginning with Windows 8) automatically give an IPv6 address priority over an IPv4 address. Because some applications do not support IPv6, Windows will automatically select the correct connection for applications, using a method called address sorting.
Windows Server 2012 R2 expands support for IPv6 in Group Policy and allows these new settings to be used with devices running Windows 8.1 or later. The expanded support includes the following:

■ TCP/IP printers can be configured to use IPv6 addresses.

■ In any Group Policy preference, item-level targeting can be used to set an IPv6 address instead of an IP address range.

■ For VPN connections, a Use IPv6 check box is available.

Source of Information : Microsoft Introducing Windows 10 For IT Professionals