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In a UDP port scan, if an empty UDP header is sent, a response from the target port would reveal that the port is ______________. No response would mean the port is ________________.
Open, Open or filtered
Filtered, closed
Filtered, filtered
Closed, filtered
The correct response is the timing technique this is considered one of the best techniques to evade firewalls and is done by sending packets gradually so they're not protected by the firewall
This answer is incorrect. If the target responds with 'ICMP port unreachable', Nmap can be sure that the port is closed. Otherwise (no response received), Nmap cannot know if the port is open, firewalled or if the packet was lost on the way. In this case, Nmap will show you the status 'open|filtered' for that port. ALOT OF CONFUSION GOING ON WITH THIS ONE SOMEONE DELETE OR REWORD.
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