Module 5
Diagnosis in Practice
The method from the very first module, now that you know every tool it can reach for - and four faults from four domains to apply it to.
In this module
- Narrow a fault from its scope before running any command
- Say what each diagnostic tool rules in and rules out
- Choose the test whose either outcome halves the search space
- Apply one method across four domains in a single sitting
Activities
What the symptom already tells you
Who is affected, what still works, when it started - and what each tool actually proves.
Knowledge check - the troubleshooting method
Seven questions on narrowing a fault, choosing a test and reading a result. Method rather than protocol.
Diagnostic capstone
Four faults from four domains, in one sitting - a route that affects one destination, a filter applied in the wrong direction, a lease handing out the wrong gateway, and a circuit that is slow rather than down. You have met each of them before, in the module that taught its topic; the point here is reaching for the method rather than for the module.
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Curriculum topics
Each topic page lists every lesson, quiz and hands-on lab that covers it, plus how it maps onto the CCNA and Network+ blueprints.