1 Network Troubleshooting Method Free Online FlashCards

What should a clear network problem statement specify?

State what fails, where, when, and for whom; include exact errors and whether the problem is constant or intermittent.

Why compare results with a known-good baseline?

Compare affected devices or locations with a known-good example or normal performance measurements to help identify what is abnormal.

In what order should you trace a communication path?

Trace communication from the endpoint and physical link through the local network and routing, then to name resolution and the target service.

What can—and can’t—a failed ping establish?

A failed ping does not by itself prove a service is unavailable; the device or network may block ping traffic.

How should plausible causes be prioritized?

Treat each possible cause as a hypothesis, then rank it by likelihood, impact, and ease of testing.

Why change only one variable at a time?

Change only one variable at a time so the result shows whether that specific change affected the symptoms.

What does it mean to isolate a network fault?

Narrow the fault to the smallest practical component, such as a device, cable, port, network path, configuration item, or service.

What characterizes a controlled network fix?

Make the smallest correction supported by evidence, follow change-control and safety requirements, and record what changed and when.

How should you verify a network fix?

Repeat the original test under the conditions that produced the problem, then check related functions and affected users or devices as relevant.

What belongs in the troubleshooting outcome record?

Document the symptoms and scope, evidence, tests and results, cause, changes, verification, and any follow-up work or workaround.

What precaution should accompany a configuration test?

Record the original setting and be ready to restore it if the test does not help.

A site is reachable by IP but not by hostname. What should you test?

If the site’s IP address is reachable but its hostname is not, investigate name resolution, including DNS configuration or records.