Nmap options

-O

OS detection

-requires root privilege

-Sn , -sP

Ping scan/sweep

-sC

Enable default scripts for scanning

-T4

Aggressive scanning

-T2

Slows down the scan to avoid triggering security defenses

-v

Verbose mode, more detailed output

-6

IPV6

-sU

UDP scan

-Pn

Disable host discovery (ping scan)

-sS

SYN scan / stealthy scan

-sT

Full TCP connect scan

-sA

ACK scan

-sW

Window scan

-sF

FIN scan

-sX

Xmas scan

-sV

Service Version detection

-PR

ARP discovery

-sI

IDLE scan

-sL

DNS scan (List scan)

-sO

Protocol scan

-g

Specify source port for the scan

(Source port manipulation)

-f

Fragmentation

-D

decoy scan

A Decoy Scan (A) involves using multiple IP addresses to obscure the true source of the scan, which might not be effective against countermeasures targeting packet structures.

-PP

ICMP timestamp ping scan