Your network contains an Active Directory domain named contoso.com.
A partner company has an Active Directory domain named nwtraders.com.
The networks for contoso.com and nwtraders.com connect to each other by using a WAN
link.
You need to ensure that users in contoso.com can access resources in nwtraders.com and
resources on the Internet.
What should you do first?

A.
Modify the Trusted Root Certification Authorities store.

B.
Modify the Intermediate Certification Authorities store.

C.
Create conditional forwarders.

D.
Add a root hint to the DNS server.

Explanation:
MCTS 70-640 Cert Guide: Windows Server 2008 Active Directory, Configuring (Pearson IT
Certification, 2010) pages 114-115
Conditional Forwarders
You can configure a DNS server as a conditional forwarder. This is a DNS server that
handles name resolution for specified domains only. In other words, the local DNS server will
forward all the queries that it receives for names ending with a specific domain name to the
conditional forwarder. This is especially useful in situations where users in your company
need access to resources in another company with a separate AD DS forest and DNS
zones, such as a partner company. In such a case, specify a conditional forwarder that
directs such queries to the DNS server in the partner company while other queries are
forwarded to the Internet. Doing so reduces the need for adding secondary zones for partner
companies on your DNS servers.