The difference between a good infrastructure troubleshooter and someone who restarts services and hopes is a mental model. When "HTTPS times out" lands in your inbox, you don't guess — you know exactly which layer to interrogate first, and in what order. The network is a stack, so treat it like...
Source: [Dev.to](https://dev.to/jjoyneriv/network-troubleshooting-as-a-stack-find-which-layer-is-broken-first-2nm6)