Networking / NOTE
Packet Flow Checklist
A short template for checking source, destination, Layer 2, routing, NAT, policy, return path and application behaviour.
Example template — replace this with your own verified technical notes.
Context
TODO — record the symptom and expected behaviour using sanitised identifiers.
Checklist
- Confirm the source and destination.
- Check Layer 2 adjacency and addressing.
- Check routing in both directions.
- Identify any NAT or security-policy decision.
- Validate DNS and the application itself.
Note: Evidence should explain the reasoning without exposing production infrastructure.
Lesson
TODO — record the reusable conclusion in your own words.