I run a browser and go to a website. The website opens up a number of connections. I can see the connections using 'netstat -ano' and the identity of the process PID. I close the web browser. But the connections stay open and are then associated with PID 0 - system idle. I log off and then log back on. I do a 'netstat -ano' and I still see the network connections and there associated process PID 0. After something like a minute or more the connections eventually go away. Is there a reason network connections do not close when the process terminates? Is there a configuration option to close the connections completely when the owning process terminates?