HOTSPOT
Your network contains an Active Directory domain named contoso.com.
You need to ensure that IP addresses can be resolved to fully qualified domain names
(FQDNs).
Under which node in the DNS snap-in should you add a zone?
To answer, select the appropriate node in the answer area.
Answer: 
Explanation:
Mastering Microsoft Windows Server 2008 R2 (Sybex, 2010) page 193
A forward lookup means the client provides a fully qualified domain name and the DNS
server returns an IP address. A reverse lookup does the opposite: the client provides an IP
address, and then the DNS server returns an FQDN.