Suppose an Ethernet packet represents a TCP acknowledgment; that is, the packet contains an IPv4 header and a 20-byte TCP header but nothing else.
2.0. How can a receiving host tell if an arriving IPv4 packet is unfragmented? Hint: such a packet will be both the "first fragment" and the "last fragment"; how are these two states marked in the IPv4 header?
One can check an unfragmented TCP acknowledgment packet by... View the full answer