Network system experiment: solve the problem of Ping failure

Today, when doing the network system experiment, it suddenly appeared ping Impassable problems , Here is the idea of solving the problem , I hope I can help other people with this problem

Conventional thinking ：
1. Check that the firewall is off
2.ipconfig see ip Whether the address is changed to the same network segment
3. You can try direct connection with network cable , See if it's a program or switch problem
4. Change several network cables , See if it's the problem of network cable

After trying the direct connection of the network cable, we found that the direct connection of the network cable ping no ！
The last discovery is that the configuration network discovery here is not turned on
Open and reopen cmd, I found that this time ping Through the ！ But after a while ping It doesn't work , Open here again , Discover that network discovery is automatically turned off again ！

Finally, open it here DDSP service ( Automatically ）, Then open it again ！