What crucial information used by NAPT is not available in most IP fragments?
What will be an ideal response?
In addition to keeping a table of source and destination addresses, NAPT uses port numbers
to associate each datagram with a TCP or UDP flow. That is, instead of stopping at the IP-layer, NAPT
operates on transport-layer headers. Entries in the translation table used by NAPT contain a 4-tuple
of source and destination IP addresses and protocol port numbers.
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