Which header field carries the fragmentation flags and the fragment offset?

• A. Protocol
• B. Time to Live
• C. Flags/Fragment Offset
• D. Identification

Answer: (C)

When a datagram is fragmented, the information needed to reassemble it is stored in the field that combines the fragmentation controls and the position of each fragment. The Flags/Fragment Offset field carries this data. The flags portion indicates fragmentation status (for example, whether more fragments follow and whether fragmentation is allowed), while the fragment offset portion shows where this fragment fits in the original datagram (in 8-byte units). This pairing is what lets the destination reorder fragments correctly and know when the last fragment has arrived. The Identification field helps group fragments from the same datagram, but it does not carry the fragmentation controls or the offset.