How do I troubleshoot a network connectivity issue?

1. Check the connection between the modem and router
2. Check that the modem is receiving data from the ISP
3. Verify the configurations of the router
4. Determine the IP address of the host or device
5. Check that the computer is connected to the router
6. Scan for and connect to the wireless connection, if applicable
7. Check for shared connections or misconfigured settings
8. Verify the DNS settings
9. Determine if proxy settings are interfering