Internet Protocol version 6 (IPv6)

The world is running out of Internet Protocol (IP) addresses because every device seems to require one these days. When IP version 4 (IPv4) originally appeared on the scene with 4,294,967,296 possible address combinations, the standards groups thought that no one could ever use that many addresses. Unfortunately, the standards groups were wrong, and we now need IPv6, which provides a significantly larger address space of 3.4028236692093846346337460743177e+38 possible addresses. Of course, the standards groups also took this opportunity to improve performance, add support for mobile devices, and make IP more secure.

Just because Windows Server 2008 supports IPv6 doesn’t mean that everyone supports it. Before you can gain the benefits of IPv6 on your own network, you need to update older machines to use it. Microsoft has no plans to support IPv6 on Windows 2000 or Windows 98 machines, as outlined in the FAQ at http://www.microsoft.com/technet/network/ipv6/ipv6faq.mspx. The same FAQ tells you how to install IPv6 support for Windows XP and Windows 2003. Fortunately, both Vista and Windows Server 2008 include IPv6 as part of their default configurations. Adding IPv6 to your own network won’t do anything for external connections. To gain the full benefits of IPv6, you must also encourage your Internet service provider (ISP) to upgrade, which may be more difficult than you think. At some point, you can expect IPv6 to become a reality across the Internet, but the wait may be a long one.


.NET Framework 3.0

The .NET Framework is now part of Windows when you install it. The main reason for this change from previous versions is that Microsoft is using the .NET Framework more and more within Windows applications. For example, you’ll find that the Internet Information Services (IIS) Manager relies on the .NET Framework. In fact, you may very well find that many parts of Windows Server 2008 rely on the .NET Framework, which means that you have to get used to some new rules for setting security. The .NET Framework 3.0 isn’t much different from the .NET Framework 2.0 in many respects — at least, not in ways that you’d notice immediately. The main difference is that this new version of the .NET Framework provides access to some new features that Microsoft includes in both Vista and Windows Server 2008. These features appear as part of new foundations that Microsoft provides for making development easier, as shown in the following list

✦ Windows Presentation Foundation (WPF): Lets you create interesting graphics displays. In general, this feature applies only to client machines because it provides access to features such as the Aero Glass display in Vista. A server developer could possibly use this feature to provide graphs, charts, and other graphical elements in an application, but it’s unlikely.
✦ Windows Communication Foundation (WCF): Provides access to Web services. A Web service is a special kind of external connection to resources on another machine. For example, an application on your server could request a database update from another server through a Web service. In most cases, you won’t even know that the application is using a Web service to perform its work, because everything happens in the background.

✦ Windows Workflow Foundation (WF): Provides a means of creating an application that relies on a workflow to perform a long-running task. Workflow is a new marketing term from Microsoft that essentially means performing a task using a specific process. Using this feature, a developer can create an application where activities must proceed in a specific order based on various conditions, such as the successful completion of another
activity. Using workflows tends to reduce human error, which is the entire point of using this functionality.

✦ Windows CardSpace: Maintains user digital identity information in a secure environment that provides an ease of use equal to working with identity or credit cards. These virtual identity cards make it easier to gain access to resources online. In addition, because the user doesn’t actually have to remember much, the digital identity can rely on complex passwords and other means of identifying the user to the server. Generally speaking, all the existing .NET applications you have will run just fine under Windows Server 2008. About the only time you notice a change is if the application requires a new .NET Framework 3.0. In most cases, these changes appear only under the new operating systems.