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Question:
Which of the following is true?
You start port scanning a system and send TCP packets with the ACK flag set. When you examine the return packets, you see that one of the ports has the RST flag set and the TTL is less than 64?
A
The response indicates an open port.
explanation
The port is open if the TTL of the returned RST packet is less than 64 according to ECC.
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