Question: Why does an ACK scan not indicate clearly that ports are open? The scanner has to guess. The target system ignores the message. ACK is

Why does an ACK scan not indicate clearly that ports are open?
The scanner has to guess.
The target system ignores the message.
ACK is not a supported flag.
ACK scans cause a lot of retransmits.
Why does an ACK scan not indicate clearly that

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