Knowing how to check ports in use in Windows is a valuable skill for system administrators and network engineers. A port is a communication endpoint on a computer, and it is identified by a number. When a program wants to communicate with another computer over a network, it sends its data to a specific port on the destination computer. To check which ports are in use on a Windows computer, you can use the following steps:
Open the Command Prompt by pressing the Windows key + R and typing “cmd”.In the Command Prompt, type “netstat -a” and press Enter.This will display a list of all the ports that are currently in use on the computer.The “Local Address” column shows the IP address and port number of the local computer.The “Foreign Address” column shows the IP address and port number of the remote computer that the port is connected to.The “State” column shows the state of the port. The most common states are “LISTENING”, which means that the port is listening for incoming connections, and “ESTABLISHED”, which means that the port is connected to another computer.