4.3. Troubleshooting Networks

💡 First Principle: To troubleshoot a network, you must use a layered, logical process of deduction to determine if the issue is local to the device, on the LAN, or beyond the gateway to the internet.

Scenario: A user cannot connect to the internet. You need to determine the scope of the problem: is it just their computer, the entire office, or an issue with the ISP?

Network issues can be complex because they involve many interconnected systems.