Your network contains an Active Directory domain named contoso.com. The domain
contains a domain controller named DC1. DC1 hosts an Active Directory-integrated zone for
contoso.com.
The research department maintains its own DNS servers and hosts a zone named
research.contoso.com on a UNIXbased server named Server1.
The perimeter network contains a DNS server named Server2. Server2 is a standalone
server that runs Windows Server 2008 R2.
You need to configure the DNS settings of Server2 to meet the following requirements:
Server2 must maintain a copy of all the records in research.contoso.com.
DC1 must query Server2 to resolve the names of Internet hosts.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)

A.
Create a secondary zone.
B.Create a conditional forwarder.
C.Create a stub zone.
D.Create a primary zone.

E.
Create a Forwarder.

Explanation:
A: When a zone that this DNS server hosts is a secondary zone, this DNS server is a
secondary source for information about this zone. The zone at this server must be obtained
from another remote DNS server computer that also hosts the zone. This DNS server must
have network access to the remote DNS server that supplies this server with updated
information about the zone. Because a secondary zone is merely a copy of a primary zone
that is hosted on another server, it cannot be stored in AD DS.
E: * A forwarder is a Domain Name System (DNS) server on a network that is used to
forward DNS queries for external DNS names to DNS servers outside that network.
Incorrect:
Not B: You can configure your server to forward queries according to specific domain names
using conditional forwarders.