Scans performed with Nmap are divided into phases, and some of them may be skipped using different Nmap options. The scan phases of Nmap are:
- Script pre-scanning: The pre-scanning phase is executed only when you use the
--script options; it attempts to retrieve additional host information via a collection of NSE scripts.
- Target enumeration: In this phase, Nmap parses the target (or targets) and resolves them into IP addresses.
- Host discovery: This is the phase where Nmap determines whether the target (or targets) is online and in the network by performing the specified host discovery technique (or techniques). The
-Pn option can be used to skip this phase.
- Reverse DNS resolution: In this phase, Nmap performs a reverse ...