$.$ Hijacking differs from spoofing in that the takeover occurs during an authenticated $2.$ The costs to the victims of successful spoofing attacks are tied to the amount of $3.$ A TCP session can be hijacked only before the hosts have authenticated successfully the contrary, there must be a complete, sustained dialogue between the machines for a minimunm session. information that was copied and the sensitivity of the data. $4.$ A successful IP spoofing attack requires more than simply forging a single header. On of five packets. $5.$ A successful hijacking takes place when a hacker intervenes in a TCP conversation and then takes the role of either host or recipient