Windows Management

Instrumentation

WMI Overview

Microsoft® Windows® Management Instrumentation (WMI) is Microsoft’s implementation of the Web-Based Enterprise Management (WBEM) effort. It is implemented on Microsoft Windows platforms.

There are two components to WMI. In the Dell™ OpenManage™ Client Instrumentation (OMCI) architecture (see Figure 1-1), both the components are represented by the Microsoft WMI Object Manager. The first component is the Common Information Model (CIM) Object Manager (CIMOM), which is the interface and manipulation point for CIM objects and information.

It acts as a facilitator in gathering information and manipulating object properties. Microsoft has implemented this component as the Windows management (winmgmt) service. The CIMOM is a software middle layer that mediates interactions between high-level management applications and the lower levels of instrumentation, such as OMCI and other providers. The CIMOM ensures that data supplied by providers is presented to management applications in a uniform and provider-independent way. The CIMOM does this, in part, by using the Component Object Model (COM) Application Programming Interface (API) for communication with providers and management applications.

The second WMI component is the repository. The repository is a binary file where the CIMOM stores management data. Such data includes information from the compiled Managed Object Format (MOF) file(s), including the CIM class definitions, properties, qualifiers, and hierarchical relationships. Instance data, as it becomes available, is also stored here.

WMI Security

WMI provides for user authentication before granting access to CIM data and methods. Access privileges are enforced by Distributed Component Object Model (DCOM) security and the CIMOM. Access, whether full

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Dell 7.6 manual Windows Management Instrumentation, WMI Security

7.6 specifications

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