Describe a symptom, choose a useful test, and verify a focused change.
Describe what actually failed
“The internet is broken” leaves too many possibilities. Record the task, affected device, exact result, and whether other users see the same thing.
Choose a discriminating test
Ask what each possible result would tell you before running a test. A failed ping alone cannot establish that a web application is down: ICMP may be filtered while other traffic is allowed.
Change, verify, record
Make a focused change supported by the evidence. Repeat the original failing task, check for side effects, and record the outcome. A change without a retest is still an unverified hypothesis.
Check your reasoning.
The expected server returns HTTP 403. Where is the evidence pointing first?
Before you move on
Use these prompts to decide what to revisit.
0 of 3 reflection prompts checked
Now change something.
Pick a fault scenario. Write down your first hypothesis, then compare it with the lab’s evidence.
Investigate a fault