The one troubleshooting habit that fixes 80% of network issues
After years doing IT support, here's the pattern I see constantly: people jump straight to reconfiguring things before they've actually isolated the problem.
My go-to process, in order, every single time:
Physical layer first — cable seated? Link light on? You'd be shocked how many "network is down" tickets are a loose Ethernet cable.
Can you ping the gateway? If not, the problem is local (NIC, cable, switch port, VLAN config) — not upstream.
Can you ping outside the LAN (e.g. 8.8.8.8)? If gateway works but this fails, it's routing or the ISP link.
DNS check — ping an IP directly vs a domain name. If IP works but domain doesn't, it's DNS, not connectivity.
Only then touch configs — and change ONE thing at a time so you know what fixed it.
Most people skip straight to step 5 and end up breaking something else while guessing. Isolate first, fix second.
If you're learning networking and want to practice this kind of structured troubleshooting on real Cisco/MikroTik setups, I run a hands-on academy for it — practical labs, not just theory.
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