Nmap
Nmap will help us identify the operating systems on remote machines by using active stack fingerprinting. With active SF, we use a tool, like nmap, to investigate systems on the network and gather any information returned from those systems. The tool evaluates the information and makes a determination as to the possible OS running on those systems.
We used nmap to scan two IP addresses on the network, mine and my partners and the following was our output:
So as we see, using nmap, the TCP ports, the port’s state, and information about the service of that port are reported.