Network Encapsulation: Follow a Packet Across the Stack
Follow an HTTPS request from a browser through transport, IP, and link layers, and learn how headers, MTU, routers, and packet captures fit together.
Posts tagged with #troubleshooting
OSI and TCP/IP Network Models
Compare the OSI and TCP/IP models, trace an HTTPS request through their layers, and use the models to narrow network failures without confusing abstractions.
Packet Capture and Network Troubleshooting: Layered Workflow
Use a layered workflow to diagnose DNS, route, TCP, TLS, and HTTP failures with ping, curl, tcpdump, and Wireshark, then collect useful incident evidence.
Trace and Secure a Web Request
Trace a web request from DNS through routing, TCP, TLS, and HTTP with safe commands, then classify failures and review least-privilege security evidence.