-v verbose
-e execute this program
(-e cmd.exe or -e /bin/sh for example, hehe)
-d stealth mode,
-n [when specified, netcat will only accept numeric IP addresses
and do no DNS lookups for anything],
-l listen
-L listen
-p nn port nn
absence of -p will bind to whatever unused port the
system gives you, just like any other normal client
connection, unless you use
-t handle any telnet negotiation the client might expect.
-u UDP instead of TCP,
-o logfile[obtains a hex dump of the data sent either way], etc