If you are having trouble connecting to your local network or the Internet, use the Windows command ipconfig to check the details. Even if your network is working fine, it’s an interesting place to visit.
See my previous post on command prompts to use the ipconfig command. You can find your network name / DNS, your IP address, subnet mask, and default gateway. You can find even more interesting details by typing ipconfig /all
Remember to type exit <Enter> to close the command prompt window.