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When a station communicates on the network for the first time, which of the following protocol would search for and find the Internet Protocol (IP) address that matches with a known Ethernet address?
Correct Answer: B
Explanation/Reference: The RARP protocol sends out a packet, which includes its MAC address and a request to be informed of the IP address that should be assigned to that MAC address. ARP does the opposite by broadcasting a request to find the Ethernet address that matches a known IP address. ICMP supports packets containing error, control, and informational messages (e.g. PING). UDP runs over IP and is used primarily for broadcasting messages over a network. Source: KRUTZ, Ronald L & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 87.