Some connectivity issues (typically being unable to reach a particular site) can be caused by a corrupted DNS cache on your computer. Clearing, or "flushing" this cache is easy to do.
Windows
- Type command into the start menu's search bar.
- Right-click on Command Prompt when it appears.
- Select Run as Administrator.
- Enter this command:
ipconfig /flushdns - Press the Enter button, then close the window.
Linux
- Open the Terminal
- Enter this command:
systemctl restart systemd-resolved.service - Press the Enter button, then close the window.
This restarts the local name service, which involves flushing the cache.