Your network contains a server that runs Windows Server 2008 R2 and has the Windows Deployment
Services (WDS) server role installed.
The server contains an image of Windows Vista Service Pack 2 (SP2), an image of Windows 7, an image of Windows Server 2008, and an image of Windows Server 2008 R2. You need to update the drivers in the images. You want to achieve this goal by using the minimum amount of administrative effort.
Which tool should you use?

A.
Dism

B.
Pkgmgr

C.
Windows Deployment Services console

D.
Windows System Image Manager (Windows SIM)

Explanation:
In Windows Server 2008 R2, you can use Windows Deployment Services to add driver packages to the server and configure them to be deployed to client computers along with the install image. Note that this functionality is only available when you are installing images of the following operating systems: Windows Vista with SP1, Windows Server 2008, Windows 7, and Windows Server 2008 R2.
WDS console because Dism no archieve this goal using the minimum administrative effort.
Source: http://technet.microsoft.com/en-us/library/dd348456(WS.10).aspx