What is the command to unblock a port in Windows?

In the Windows operating system, when an application or service needs to be run, a port is allocated for communication with the network. However, sometimes after closing an application or service, the port is occupied and cannot be released immediately, preventing other programs from using the port. To solve this problem, Windows provides some commands to unblock the port.

The following are commonly used commands to release port occupation:

1. netstat command: This command is used to view the ports currently in use and their corresponding applications. At the command prompt enter "netstat -ano", and then press Enter, all network connections, listening ports and their PIDs (process IDs) will be listed. By looking up the PID corresponding to the occupied port, you can know which application is using the port .

2. tasklist command: This command is used to view running processes and their corresponding PIDs. Enter "tasklist" at the command prompt and press Enter. All running processes and their PIDs will be listed. By comparing it with the results of the netstat command, you can find out the name of the process occupying a specific port.

3. taskkill command: This command is used to terminate the specified process. At the command prompt, enter "taskkill /PID ", and then press Enter, where "" is the PID of the process to be terminated. By using the PID obtained by using the netstat command and the tasklist command, the background process occupying the port can be terminated.

4. TCPView tool: This is a graphical port monitoring tool provided by Microsoft. It can display the ports currently in use and their corresponding applications in real time. By double-clicking an application occupying a specific port, you can choose to close the process.

These commands can be run in the Windows command prompt. However, please note that you need to be careful when using the taskkill command to ensure that the terminated process is indeed the process occupying a specific port and has a small impact on the system.

After the port is released, other programs can reuse the port for communication. The use of the port occupation release command can help improve system stability and network performance, and ensure that applications can execute normally.

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