Domain Name Service is a distributed database system that is used to map:

A.
Domain Name to IP addresses.

B.
MAC addresses to domain names.

C.
MAC Address to IP addresses.

D.
IP addresses to MAC Addresses.

Explanation:
Domain Name Service translates domain names into IP addresses.
Incorrect Answers:
B: DNS is not used to map MAC addresses to domain names. DNS maps domain names into IP addresses.
C: The RARP protocol translates MAC Address to IP addresses.
D: The ARP protocol translates IP addresses to MAC Addresses.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 599