-1
Sets ICMP Mode (ICMP ping)
-2
Sets UDP mode
-8
Sets scan mode, expects ports to be scanned
-9
Sets Hping listen mode, triggers on a signature argument
–flood
Will send packets as fast as possible
-Q
Collect sequence numbers
-F
sets the FIN flag
-S
sets the SYN flag
-R
Sets the RST flag
-P
Sets the PSH flag
-A
Sets the ACK flag
-U
Sets the -URG flag
-X
Sets the XMAS scan flags