Which RFC documents ARP?

Which RFC documents ARP?

• A. RFC 791
• B. RFC 1034
• C. RFC 2549
• D. RFC 826

Answer: (D)

ARP maps IP addresses to MAC addresses on a local network, bridging the IP layer and the data link layer. RFC 826 is the official specification for this protocol, titled Ethernet Address Resolution Protocol, and it details how hosts broadcast a request for the MAC corresponding to a known IP and how the responding device provides that MAC so the sender can frame the Ethernet frame correctly. The other documents cover different topics: IPv4 itself is defined in RFC 791, DNS concepts in RFC 1034, and IP-in-IP tunneling in RFC 2549, none of which define ARP.

ARP maps IP addresses to MAC addresses on a local network, bridging the IP layer and the data link layer. RFC 826 is the official specification for this protocol, titled Ethernet Address Resolution Protocol, and it details how hosts broadcast a request for the MAC corresponding to a known IP and how the responding device provides that MAC so the sender can frame the Ethernet frame correctly. The other documents cover different topics: IPv4 itself is defined in RFC 791, DNS concepts in RFC 1034, and IP-in-IP tunneling in RFC 2549, none of which define ARP.