Discovery, also known as Host Discovery, is a process to enumerate live hosts and is a very important component of the reconnaissance phase of a security testing activity. This will help you to eliminate the unwanted hosts from the list of targets, thus it will allow you to use these enumerated hosts to perform targeted scans and penetration tests. Some of the tools that can be used to perform Network Discovery are Nmap, Nessus, OpenVas, and Wireshark.
The following screenshot shows a sample host scanned using Nmap for Discovery. It shows that the host is up, thus we can determine the host is live:
These tools come in handy if the ...
