Recall that packet reordering and reassembly occurs at the transport level of the TCP/IP protocol suite. A firewall will operate at a lower layer, either the internet or data layer. How can a stateful inspection firewall determine anything about a traffic stream when the stream may be out of order or damaged?
What will be an ideal response?
This
is
precisely
the
difficulty
of
a
stateful
inspection
firewall.
It
must
perform
the
upper-?layer
actions
of
reordering
and
reassembly.
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