Although the Win32 provider class capabilities cover a lot of material, we haven't examined WMI providers that support various components and applications, which are part of Windows Server 2003 and the previous Windows platforms. Under Windows Server 2003, WMI comes with more than 40 other providers supporting a specific set of classes. We must make a clear distinction between the providers that are part of the system installation and the ones that can be added during an optional software component installation. In this chapter, we will only focus on the WMI providers provided with the Windows Server 2003 installation. For example, this includes providers such as the IP routing providers, the DNS providers, the Active Directory providers, and the Resultant Set of Policies (RSOP) providers, to name a few. WMI providers related to optional Windows Server 2003 components or applications, such as Internet Information Server (IIS) provider, Network Load Balancing (NLB) provider, and the Cluster Service provider, will be examined later in the book, as will certain WMI-enabled applications such as Exchange 2000, HP OpenView Operations for Windows, Microsoft Operation Manager, and the Windows Server 2003 Framework.