Free Network+ practice question with explanation
This original learning scenario demonstrates the reasoning to practice. It is not an official or recalled exam item.
A client reaches a known service by IP address but cannot resolve its hostname. Which check best follows that observation?
- Replace every network cable.
- Change the default gateway immediately.
- Inspect the configured DNS resolver and test a name lookup.
Show answer and explanation
Answer: C. Successful communication by address suggests that at least that tested path works. A failed hostname lookup makes DNS configuration and resolver responses useful next checks. It does not prove that all routing or connectivity is healthy. Compare the affected client with a working client and preserve the actual lookup result.
Turn the question into a practical exercise
Draw the client, gateway, DNS resolver and destination. Record what an address-based connection tests, what a name lookup tests and what neither observation proves.
Write down the symptom, the evidence you would collect, the next action and the condition that would make you escalate. Label a paper exercise as a simulation; do not present it as work performed on a live system.
What should you review next?
Addressing, switching concepts, wireless networking, monitoring and step-by-step connectivity troubleshooting. After a practice session, group mistakes by concept and explain the right answer in your own words. Review the topic again after a gap before trying a timed mock. Repeated exposure to the same question can improve recall without demonstrating understanding.
Continue Network+ practice · Try a timed study mock · Open the quick-review resource · Explore labs
Does a high practice score mean I am ready?
A score is one signal. Explain unfamiliar scenarios, demonstrate the practical tasks and compare your study coverage with the certification vendor’s current objectives. CertNivo does not issue the vendor certification or guarantee an exam outcome.