How to check network traffic in Microsoft Windows including all open ports and established connections

1)Login in admin account & open Run by pressing Win+R

2) Type Cmd, and press ok. This will open command prompt

3) Type netstat -a -n -o and hit enter button

-a display all connections and listening ports
-n display addresses and port numbers in numeric form
-o displays owning process I'd associated with connection

4) It will display list of open connections with ports, source and destination address and status and owning executable file of process