Windows 8 Developer Preview downloads

You can get it from the following link:

http://dev.windows.com/

It will be available in x86 (32 or 64 bit) and there will be no activation required.

How DNS works

GlobalName Zones

The GlobalNames Zone is a new feature in Windows 2008 and R2 that provides single-label name resolution for large enterprise networks that do not deploy WINS and where using DNS name suffixes to provide single-label name resolution is not practical.
Today, numerous Microsoft customers deploy WINS technology and servers in their environment. WINS is an alternative name resolution protocol to DNS. It is an older service that uses NetBIOS over TCP/IP (NetBT). WINS and NetBT do not support IPv6 protocols. To help customers migrate to DNS for all name resolution the DNS Server role in Windows Server 2008 supports a special GlobalNames Zone (GNZ) feature.

Link

Name Resolution

Windows 2008/R2 and Windows 7 use three types of name resolution system:

1) Link Local Multicast Name Resolution (LLMNR)
2) NetBIOS
3) Domain Name System (DNS)

DNS is the preferred name resolution system in Windows networks and used whenever is available.

How to install and uninstall IPv6 on Windows XP

1. To install IPv6 on your Windows XP computer, follow these steps:
• Click Start, click All Programs, click Accessories, and then click Command Prompt.
• At the command prompt, type netsh int ipv6 install and press the Enter key on your keyboard.
• Close the Command Prompt window.

2. To uninstall IPv6 on your Windows XP computer, follow these steps:
• Click Start, click All Programs, click Accessories, and then click Command Prompt.
• At the command prompt, type: netsh int ipv6 uninstall and press the Enter key on your keyboard.
• Close the Command Prompt window and restart the computer.

IPv6 Address Types

IPv6 currently define three types of addresses:

•   Global Addresses:  IPv6 Global Addresses are the equivalent of public IP Addresses in IPv4.  An example of a global address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334. Global Addresses are routable on the IPv6 Internet.

•   Link-Local Addresses: Link-local addresses are similar to APIPA address (169.254.0.0/16) in IPv4. An example of a global address is fe80::8ca1:3a64:a9b3:bc67%13. Link-Local Addresses  are not routable.

•   Unique Local Address:  Unique Local Address is the equivalent of the private addresses in IPv4 (10.0.0.0/8 – 172.16.0.0/12 – 192.168.0.0/16) An example of a Unique Local Address is fd00:dfba:9375:ffff::/12. Unique-Local Addresses are routable within a private network but not on the IPv6 Internet.

Exploring the Layers of the TCP/IP Networking Model