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Nmap is a network scanning programme that scans IP packets to identify all connected devices and offer information on the services and operating systems they are running.

  • It can be used for network audits because it can detect new servers.
  • It may search subdomains as well as queries in the Domain Name System.
  • Interaction with the target host is possible via the Nmap scripting engine (NSE).

  • Host discovery is the process of locating hosts on a network.
  • Scanning for open ports on target hosts is known as port scanning.
  • Interrogating network services on remote devices to ascertain the application name and version number is known as version detection.

Nmap searches for hosts and services on a network. When those hosts and services are discovered, the software platform transmits information to them, and they react. Nmap reads and interprets the answer and utilises the data to construct a network map.

Nmap flags are the arguments we specify when calling the programme; for example, -Pn (no ping) prevents nmap from pinging targets. The primary flags of nmap are listed here, along with examples. -p: The -p argument or flag allows you to specify one or more ports or port ranges.

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