from our Lab Team:
it shouldn’t have read specifically no ping, but instead without sending bits / setting the TCP header flag to 0. For ref: https://nmap.org/book/scan-methods-null-fin-xmas-scan.html
In any case, I’ve updated the content in the module and this question to refer to not sending bits as opposed to no ping.
For ref: https://nmap.org/book/scan-methods-null-fin-xmas-scan.html
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