Your network contains an Active Directory forest that contains two domains. The forest contains five
domain controllers. The domain controllers are configured as shown in the following table.

You need to configure DC5 as a global catalog server. Which tool should you use?

A.
Active Directory Domains and Trusts

B.
Active Directory Users and Computers

C.
Active Directory Administrative Center

D.
Active Directory Sites and Services

Explanation:
If you have more than one domain in your forest and you have a significant user population in a site,
you can optimize the speed and efficiency of domain logons and directory searches by adding a
global catalog server to the site. If you have a single-domain forest, global catalog servers are not
required for logons, but directory searches are directed to the global catalog. In this case, you can
enable the global catalog on all domain controllers for faster directory searches. You can use the
same user interface (UI) in the Active Directory Sites and Services snap-in to add or remove the
global catalog. Enabling the global catalog can cause additional replication traffic. However, global
catalog removal occurs gradually in the background and does not affect replication or performance.
Membership in the Enterprise Admins group in the forest or the Domain Admins group in the forest
root domain, or equivalent, is the minimum required to complete this procedure. To add or remove
the global catalog Open Active Directory Sites and Services.
To open Active Directory Sites and Services, click Start, click Administrative Tools, and then click
Active Directory Sites and Services.
To open Active Directory Sites and Services in Windows Server 2012, click Start , type dssite.msc. In
the console tree, click the server object to which you want to add the global catalog or from which
you want to remove the global catalog.
Where?
Active Directory Sites and Services\Sites\SiteName\Servers In the details pane, right-click NTDS
Settings of the selected server object, and then click Properties. Select the Global Catalog check box
to add the global catalog, or clear the check box to remove the global catalog.
Global catalog servers and sites.
To optimize network performance in a multiple-site environment, consider adding global catalog
servers in sites according to the needs in the sites for fast search responses and domain logons. It is
recommended to make all domain controllers be global catalog severs if possible. In a single-site,
multiple-domain environment, a single global catalog server is usually sufficient to cover common
Active Directory queries and logons.