Info

R = 1 High

Flag. It has 3 bits, the first bit is unused. The other bits are DF = Do not fragment, and MF = More fragment. If DF = 1, datagram can not be fragmented. If MF = 1 fragmented.

Other fields. The fragmented offset field represents the offset of data in multiples of eight. The total length field identifies the total length of the datagram in bytes. ID is the identification number created by the sending node. This number is required when reassembling fragmented messages.

TTL field indicates the time in seconds that a datagram may remain on the network before it is discarded. This value (32 or 64) is set by the sender and is decremented by one everytime a router handles the datagram.

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