Correct Answer & Explanation:D. Every network adapter has a unique Media Access Control (MAC) address assigned to it. The MAC address is the unique ID serial number of the Ethernet card in one's computer. MAC addresses are needed in a LAN for computers to communicate; therefore, answer
D is correct. Note that MAC addresses have nothing to do with Apple Macintosh computers.
Incorrect Answers & Explanations:A,
A is incorrect, as DNS (The Domain Name Service) translates IP addresses to hostnames across the network and the Internet. Answer
B is incorrect, as NAT (Network Address Translation) ...