Which statement describes the MF flag in IPv4 fragmentation?

• A. MF indicates more fragments follow.
• B. MF indicates the last fragment.
• C. MF indicates the fragment offset.
• D. MF identifies the original packet.

Answer: (A)

MF (More Fragments) is the flag in the IPv4 header that tells the reassembler whether more fragments of the same packet are coming. When a datagram is fragmented, every fragment except the last has MF set to 1, and the final fragment has MF set to 0. This flag works together with the fragment offset so the receiving system can reconstruct the original payload in the correct order. The other flag in the same field, not to be confused with MF, is the Don't Fragment bit, which controls whether routers are allowed to fragment at all, and the Identification field helps match all fragments that belong to the same original packet.