Which of the following service is a distributed database that translate host name to IP address to IP address to
host name?

A.
DNS

B.
FTP

C.
SSH

D.
SMTP

Explanation:
The Domain Name System is lists of domain names and IP addresses that are distributed on Domain Name
System (DNS) Servers throughout the Internet in a hierarchy of authority. The DNS service translates domain
names into IP addresses.
Incorrect Answers:
A: FTP does not translate host names to IP addresses. FTP is a network application that supports an exchange
of files between computers.
C: SSH does not translate host names to IP addresses. SSH allows remote login and other network services to
operate securely over an unsecured network.
D: SMTP is used for sending email messages. SMTP does not translate host names to IP addresses.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 591