Nmap has established itself as a premier, free, open-source network mapping tool. There are alternatives that are also free, though they vary in their sophistication and ease of use.

In this Nmap tutorial, get Nmap scan examples that show how to identify various devices on the network and interpret network data to discover possible vulnerabilities or infections.

The Nmap Project just released the Holiday Edition of its open source cross-platform security scanner and network mapper, with several important improvements and bug fixes. New features in Nmap 7. ...