IP packet

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bit offset 0–3 4–7 8–13 14-15 16–18 19–31
0 Version Internet Header Length Differentiated Services Code Point Explicit Congestion Notification Total Length
32 Identification Flags Fragment Offset
64 Time to Live Protocol Header checksum
96 Source IP Address
128 Destination IP Address
160 Options ( if Header Length > 5 )
160
or
192+
 
Data