Step 1- Search for cmd and right click on cmd and then run as administration.
step 2- Type ping "www.google.com" in command prompt and enter.
step 3 - In is showing some data on your command prompt.
ping statistics for 172.217.160.228(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.
step 4- You can check minimum,average and maximum time to connect to www.google.com which is given in milli-seconds.