Fragment offset value represents what in IPv4 fragmentation?

Fragment offset value represents what in IPv4 fragmentation?

• A. The total length of the IP packet
• B. The number of bytes displayed from the beginning of the original packet (begins after IP header)
• C. The number of fragments
• D. The offset from the source address

Answer: (B)

The fragment offset tells where this fragment’s data begins within the original packet’s payload. It’s expressed in 8-byte units, so to get the actual byte offset you multiply by 8. The first fragment starts at offset 0, and later fragments have increasing offsets, which allows the receiver to piece the pieces back together in the correct order. This is different from the total packet length, the number of fragments, or any offset from the source address.

The fragment offset tells where this fragment’s data begins within the original packet’s payload. It’s expressed in 8-byte units, so to get the actual byte offset you multiply by 8. The first fragment starts at offset 0, and later fragments have increasing offsets, which allows the receiver to piece the pieces back together in the correct order. This is different from the total packet length, the number of fragments, or any offset from the source address.