Practice 05-network-troubleshooting-tools-and-methodology: Homework

Independent application with evidence.

Show commands for:

Class 26: Network troubleshooting — Class 26 visual reference. Use it as the map, then prove it in the reading, lesson, and lab.

Overview

Module: Network Operations
Activity type: Homework / independent application
Objective: Apply a layered troubleshooting workflow from local state through application response

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Requirements

assignment

Create a troubleshooting worksheet for a hypothetical service at app.example.test:8443. Include the exact symptom, at least three ordered hypotheses, one minimally invasive test per hypothesis, the expected result for each test, and a stopping condition before any configuration change.

extension

Repeat the reasoning on an authorized homelab service without changing it. Compare a literal-address request with a hostname request and document whether the two tests exercise the same resolver and address-family path.

deliverable

Submit a one-page incident note containing scope, timestamps, commands, relevant output excerpts, hypothesis updates, final conclusion, and any remaining uncertainty.

grading_criteria

The scope and expected behavior are explicit.
Tests isolate name resolution, routing, transport, and application behavior.
Claims are supported by observed evidence.
No unnecessary configuration change is proposed.
The note distinguishes confirmed facts from assumptions.

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Submit / record

[ ] Evidence artifacts (secrets redacted)
[ ] Spiral connections written
[ ] Ready for topic quiz