Podcast
Questions and Answers
What indicates that a fragment is the final piece of data during reassembly?
What indicates that a fragment is the final piece of data during reassembly?
- The fragment comes from a different network.
- The size of the fragment is greater than others.
- The flag bit in the header is set to (1).
- The flag bit in the header is set to (0). (correct)
Who is responsible for performing the reassembly of fragments?
Who is responsible for performing the reassembly of fragments?
- Any intermediate router in the network.
- Only the final destination host. (correct)
- The sender of the fragments.
- All hosts within the network.
What might occur if a fragment arrives at a network with a smaller MTU?
What might occur if a fragment arrives at a network with a smaller MTU?
- The fragment may be dropped or require further fragmentation. (correct)
- The fragment will automatically expand to fit.
- The fragment will merge with other fragments.
- The fragment will be stored until the MTU increases.
What does 'fragmenting a fragment' imply?
What does 'fragmenting a fragment' imply?
Why is it important for only the final destination host to reassemble fragments?
Why is it important for only the final destination host to reassemble fragments?
Flashcards
Datagram Reassembly
Datagram Reassembly
The process of combining fragmented datagrams back into the original message.
Final Fragment
Final Fragment
The final fragment of a datagram, indicated by the flag bit set to 0 in the header.
Why does the destination host reassemble?
Why does the destination host reassemble?
The destination host is responsible for reassembling fragments because it is ultimately where the complete message needs to be delivered.
Fragmenting a Fragment
Fragmenting a Fragment
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Is it possible to fragment a fragment?
Is it possible to fragment a fragment?
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Study Notes
Datagram Reassembly
- Datagram reassembly is the process of creating a copy of the original datagram from its fragments.
- The fragment containing the final data piece has a flag bit set to 0 in its header. This indicates the end of the fragmented data, enabling the receiver to determine if all fragments have arrived.
- Only the final destination host should perform reassembly.
Fragment Fragmentation
- If a fragment reaches a network with a smaller MTU (Maximum Transmission Unit), it may need to be further fragmented.
- Fragmenting a fragment is possible.
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