You are the systems administrator for your company. The company’s network consists of a single Active Directory domain. You want to install Windows Essential Business Server (EBS) 2008 in the existing domain. You need to verify the status of the domain controller that has the schema master role installed.

Which operating system can be running on this computer? (Choose all that apply.)

A.
Windows 2000 Server

B.
Windows 2000 Server Service Pack 4 (SP4)

C.
Windows Server 2003 Service Pack 1 (SP1) or SP2

D.
Windows Server 2008

Explanation:
The domain controller that has the schema master role installed must be running Windows Server 2003 SP1 or SP2 or Windows Server 2008. When you install Windows EBS 2008 in an existing domain, there are several software and operating system requirements that must be met, including:

* The domain must have at least one domain controller running Windows Server 2003 SP1 or SP2 or Windows Server 2008.
* Other domain controllers must be running Windows 2000 Server SP4, Windows Server 2003 SP1 or SP2, or Windows Server 2008.
* The domain functional level of the existing domain must be Windows 2000 Server native mode or Windows Server 2003.
* The domain controller that has the schema master role must be running Windows Server 2003 SP1 or SP2 or Windows Server 2008.
* The domain must have at least one global catalog running Windows Server 2003 SP1 or SP2 or Windows Server 2008.

The options stating Windows 2000 Server and Windows 2000 Server SP4 are incorrect because these operating systems cannot be running on schema master while installing Windows EBS 2008 in an existing domain.