GIAC Security Essentials Certification (GSEC) — Question 54

Which of the following protocols is used by a host that knows its own MAC (Media Access Control) address to query a server for its own IP address?

Answer options

• A. RARP
• B. ARP
• C. DNS
• D. RDNS

Correct answer: A

Explanation

The correct answer is RARP (Reverse Address Resolution Protocol), which allows a device to determine its own IP address given its MAC address. ARP (Address Resolution Protocol) is used for resolving IP addresses to MAC addresses, while DNS (Domain Name System) and RDNS (Reverse Domain Name System) are for resolving domain names to IP addresses and vice versa, making them not applicable in this context.