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IP spoofing refers to the procedure of an attacker changing his or her IP address so that he or she appears to be someone else.

Which of the following IP spoofing detection technique succeed only when the attacker is in a different subnet?
a. Direct TTL probes technique
b. IP identification number technique
c. TCP flow control method
d. UDP flow control method

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Cetacea

Answer: A) Direct TTL probes technique

Explanation:Direct TTL probe technique that is technique that is used when the attacker is accessing from any smaller part of IP address that is known as subnet. This technique is successful because it sends the packet to the particular host and time to live(TTL) of the return message is not equal to the packet checking processing, then the IP spoof is present in the packet.

Therefore, the correct option is option(A).