Answer: A) Direct TTL probes technique
Step-by-step 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).