Which technology allows both 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.CIWcertefied.com instead of the IP address for the company site. Which technology allows both URL and the IP address to refer to the same Web site?

A.
Network Access Point (NAP).

B.
Domain Name Server (DNS).

C.
Internet Service Provider (ISP).

D.
Uniform Resource Identifier (URI).