You can guess by its name that this scan will take a bit more time than all the other ones. This is the most accurate and comprehensive scan of all the scans available, with every TCP and UDP being scanned and all minor scans and detections being enabled, including OS detection, version detection, script scanning, and traceroute.

This is a highly intrusive scan, which uses three different protocols in order to detect the hosts: TCP, UDP, and SCTP (Stream Control Transmission Protocol).

This scan, unlike others, will not give up if the initial ping request fails and will try as much as possible to identify the host by using every possible method. This scan smartly camouflages itself as port 53, which is the port number for Domain Name System (DNS).