Which technology allows both the URL and the IP address to refer to the same Web site?

Chris works on the Web team for his company. He updates the company Web site at the IP
address 12.42.192.73. On Chris’s business cards, he uses the URL www.CIWcertified.com
instead of the IP address for the company site. Which technology allows both the URL and the IP
address to refer to the same Web site?

A.
Domain Name System (DNS)

B.
Internet Service Provider (ISP)

C.
Uniform Resource Identifier (URI)

D.
Network Access Point (NAP)