-6
IPv6 only
-4
IPv4 only
-d
Delay between reads/writes
-o
Output session to a file
-x
Output session to a hex dump
-sL
List scan. Only list targets to scan
-sn
Ping Scan- disable port scan.
-Pn
Treat all hosts as online – skip host discovers
-sS
Stealth scan: TCP SYN scan
-sT
TCP Connect() scan
-sA
TCP Ack scan
-sW
TCP Window scan
-sM
TCP Maimon scan
-sU
UDP scan
-sN
NULL scan
-sF
FIN scan
-sX
XMAS scan