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Cisco CCNA/CCENT Exam 640-802, 640-822, 640-816 Preparation Kit by Dale Liu

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1. What is the unique physical address (Burned In Address—BIA) that is found on all NICs called?
A. DNS Address
B. NAT Address
C. IP Address
D. MAC Address
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, B, and C. Answer 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) ...

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