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Fragmentation of IPv4 Datagram | GATE 2023 | Part 2| Identification | flags | fragmentation offset

Alice AUSTIN

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Alice AUSTIN

Alice AUSTIN is studying Cisco Systems Engineering. He has passion with both hardware and software and writes articles and reviews for many IT websites.

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6 thoughts on “Fragmentation of IPv4 Datagram | GATE 2023 | Part 2| Identification | flags | fragmentation offset”

  • Won't the presence of DoNotFragment flag = 1 indicate not to do fragmentation of that datagram any further?
    In that case, how can we infer when D = 1 and M = 0 that fragmentation has been done? Doesn't it simply say that Do not fragment this datagram any further, and this datagram might be the last fragment if fragmentation was done before. How can we infer from this that fragmentation has surely happened before?

    Also, won't DoNotFragment = 1 and MoreFragments = 1 mean that fragmentation has been done, but we don't want our first or middle fragments to be fragmented any further. Then why can't both D and M be 1 at the same time?

  • If D is fragmented into D1, D2, D3 and we want D2 to not fragment further we set it's D bit to 1 but since D3 is the last fragment D2's M should also be set to 1 right, in that case D and M both becomes 1 ?

  • 20:10 | I think we can infer that fragmentation did not occur as sir as mentioned in the video previously that D and M field both being 1 is contradictory. So of M is 1 then D must be 0.

    Am I missing something?

  • first byte of that fragment will be 800 since 800/8 = 100 and last byte this particular fragment will be 1599

  • sir your deliver content mind blowing itna easy patience se koi kese pada skta hai🙏🙏🙏

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