If you want to know which application is listening on a particular network port on a Microsoft Windows system, e.g., port 80, the port used for HTTP connections to a web server, you can obtain that information from a command line interface (CLI) by obtaining a command prompt and using the netstat and tasklist commands which are provided with the operating system; you do not need to install any additional software, though there are programs that will allow you to view that information from a graphical user interface (GUI).
[ More Info ]
