Which protocol is used to determine a hardware address from a given IP address?
A.
Address resolution protocol (ARP).
B.
Reverse address resolution protocol (RARP).
C.
Carrier sense multiple access with collision detection (CSMA/CD).
D.
Domain name system (DNS).
Explanation:
ARP is used to determine the MAC address of the destination node of an IP packet. The ARP
message is sent bearing the IP address. The node with that IP address adds its MAC address to
the message and returns an ARP response.
Incorrect Answers:
B: RARP is the opposite. You give it the hardware address (MAC address) and it returns the IP
address.
C: CSMA/CD is the physical medium access method used by hardware protocols such a Ethernet.
It is not directly involved with addressing.
D: A DNS server performs IP to NAME mappings. Neither is a hardware address.