Search for cmd and right click on cmd and then run as administration.
Type ping “www.google.com” in command prompt and enter.
In is showing some data on your command prompt.ping statistics for 188.8.131.52(www.google.com)You have to check the “Loss %”. If is “0” then your network is completely established and if it is “100 %” then your network is not established.
You can check minimum,average and maximum time to connect to www.google.com which is given in milli-seconds.