Think of your IP address as the street address of an apartment building, and the port number as the individual apartment number. Data needs both to reach the correct destination. TCP vs. UDP:
: Search for "cmd" in the Start menu and select Run as administrator .
Or in PowerShell:
For legacy compatibility, you can revert to the older range (1024–5000), but modern Windows uses the IANA-recommended range.
Windows 11 has several types of open ports:
Connection-oriented. It establishes a reliable connection between devices, verifies that data packets arrive intact, and retransmits lost data. Web browsing (HTTPS) and file transfers (SFTP) rely on TCP.
You can also use third-party tools like:
In Resource Monitor, go to the Network tab and expand the Listening Ports section.
: Search for "Windows Defender Firewall with Advanced Security" in the Start menu or find it under Settings > Privacy & security > Windows Security > Firewall & network protection > Advanced settings .
Think of your IP address as the street address of an apartment building, and the port number as the individual apartment number. Data needs both to reach the correct destination. TCP vs. UDP:
: Search for "cmd" in the Start menu and select Run as administrator .
Or in PowerShell:
For legacy compatibility, you can revert to the older range (1024–5000), but modern Windows uses the IANA-recommended range.
Windows 11 has several types of open ports:
Connection-oriented. It establishes a reliable connection between devices, verifies that data packets arrive intact, and retransmits lost data. Web browsing (HTTPS) and file transfers (SFTP) rely on TCP.
You can also use third-party tools like:
In Resource Monitor, go to the Network tab and expand the Listening Ports section.
: Search for "Windows Defender Firewall with Advanced Security" in the Start menu or find it under Settings > Privacy & security > Windows Security > Firewall & network protection > Advanced settings .