Which of the following services allows a user to run specific programs and tools with diverse
permissions than the user’s current logon provides?

A.
WCF service

B.
RunAs service

C.
Web service

D.
WMI service

Explanation:
RunAs service allows a user to run specific programs and tools with diverse permissions than the
user’s current logon provides. Account with restrictive permissions should be used by administrators
to perform routine, non-administrative tasks, and use an account with broader or full permissions
only when performing specific administrative tasks. To run the tools (that require broader
permissions) without logging off and back on, a user can log on with a regular user account and use
the runas command.

C is incorrect. A Web service is a way of communicating between two electronic devices.
The World Wide Web Consortium (W3C) defines a “Web service” “as a software system intended to
support interoperable machine-to-machine interactions over a network. It has an interface deviced
in a machine-processable format, particularly the Web Services Description Language (WSDL). Other
systems interact with the Web service in such a way as is approved by its description; using SOAP
messages and conveyed using HTTP with an XML serialization combining other Web-related
standards.”
The W3C also identifies two major classes of Web services, which are as follows:

1.The REST-compliant Web services in which the basic use of the service is to manipulate XML
representations of the Web resources through a uniform set of “stateless” operations.
2.The Arbitrary Web services in which the service may possibly represent an arbitrary set of
operations.

A is incorrect. A WCF Service is composed of three parts: a Service class that implements
the service to be provided, a host environment to host the service, and one or more endpoints to
which clients will connect. All communications with the WCF service happens via the endpoints. The
endpoints specify a Contract that defines which methods of the Service class will be accessible via
the endpoint; each endpoint may expose a different set of methods. The endpoints also define a
binding that specifies how a client will communicate with the service and the address where the
endpoint is hosted.
In Windows Vista, Windows Server 2008 and Windows 7 (OSs that include IIS 7), Windows Activation
Services can be used to host the WCF service. Otherwise the WCF service can be hosted in IIS, or it
can be self-hosted in any process by using the ServiceHost class, which is provided by WCF. A selfhosted WCF service might be provided by a console-based application, a Windows Forms
application, or a Windows service.

D is incorrect. The WMI service runs side-by-side with WinRM and provides requested data
or control through the WMI plug-in. A user can continue to obtain data from standard WMI classes,
such as Win32_Process, as well as IPMI-supplied data.