Troubleshooting & Network Security
NAT, firewalls, layered troubleshooting, and a full connection diagnosis lab.
1. NAT, Firewalls & Routers
How NAT, routers, and firewalls shape inbound and outbound traffic at the network edge.
15 min
+24 XP
2. Network Troubleshooting Steps
A layered checklist: link, IP, gateway, DNS, and application—with copy-paste commands.
15 min
+23 XP
3. Lab — Diagnose a Broken Connection
Run ping, dig, and curl in order to isolate DNS vs routing vs TLS failures.
25 min
+23 XP
4. Quiz — Troubleshooting & Network Security
10-question module quiz on NAT, firewalls, routers, and layered network troubleshooting.
10 min
+23 XP