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TOPIC: problem on IP datagram

problem on IP datagram 11 years 10 months ago #6091

hi,

if u know the answer ...please.....

An IP datagram is to be fragmented. Which options in the option
field need to be copied into the header of each fragment, and which need only be retained in the first fragment?


thanx in advance...
pagadala
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Re: problem on IP datagram 11 years 1 month ago #9530

  • jwj
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When an IP datagram is fragmented, the headers for all the fragmented datagrams will be essentially the same. The only fields in the header that will be changed is:

the total length because now the packets are smaller,

the more fragments field except for the last fragment which will not have a value in that field,

the fragment offset which shows the position the fragment has in relation to the original (now fragmented) datagram,

and the header checksum.

Things like source/destination, etc. will be retained in each fragment.
-Jeremy-
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