tcpdump(1) on macOS
The text 9cb846f283fe, as Mac OS X 10.1.5, Mac OS X 10.1.4, Mac OS X 10.1.3, Mac OS X 10.1.2, Mac OS X 10.1.1, Mac OS X 10.1 shipped it.
dump traffic on a network
Flags it lists
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-E -
-F -
-N -
-O -
-R -
-S -
-T -
-X -
-a -
-c -
-d -
-dd -
-ddd -
-e -
-f -
-i -
-l -
-m -
-n -
-p -
-q -
-r -
-s -
-t -
-tt -
-v -
-vv -
-vvv -
-w -
-x