I can't see which ports are available for connection
To check the status of the connection ports, launch the Run Windows application and type
NETSTAT -a. This command displays a list of all active ports with their respective status.
The port status list:
The port has an active connection.
There is a connection request for the port in question.
The door is closed, and the connection will be closed.
The connection is closed, and the port is waiting for the remote connection to hang up.
The port is waiting for packet processing to finish after it is closed.
The port is not being used.
The remote connection has been disconnected, and the expected that door to be closed.
The remote connection has been disconnected, and the door is closed.
The port is waiting for a connection request.
Both connection ports are closed, but data is still being sent.
The connection status is unknown.