What RFC defines the IP header checksum calculation?

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Multiple Choice

What RFC defines the IP header checksum calculation?

Explanation:
The calculation method for the IP header checksum is defined in RFC 1071. This document specifies how to compute the Internet checksum used by IP, TCP, and UDP: treat the header data as 16-bit words in network byte order, add them using ones’ complement arithmetic, fold any carries back into the sum, and finally take the ones’ complement of the total. RFC 791 covers the IPv4 header format (including the presence of a checksum field) but not the calculation algorithm itself. The other options relate to different topics (IPv6, DNS, or both) and do not define this particular checksum calculation.

The calculation method for the IP header checksum is defined in RFC 1071. This document specifies how to compute the Internet checksum used by IP, TCP, and UDP: treat the header data as 16-bit words in network byte order, add them using ones’ complement arithmetic, fold any carries back into the sum, and finally take the ones’ complement of the total. RFC 791 covers the IPv4 header format (including the presence of a checksum field) but not the calculation algorithm itself. The other options relate to different topics (IPv6, DNS, or both) and do not define this particular checksum calculation.

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