CompTIA Network+ — Practice Exam
5.0 Network Troubleshooting: practice questions
Our CompTIA Network+ bank has 78 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
On Windows, which command releases and renews a DHCP address?
- ifconfig down
- netstat -r
- ipconfig /release and ipconfig /renew
- nslookup /renew
Show the answer
C. ipconfig /release and ipconfig /renew — ipconfig handles Windows IP settings; ip or ifconfig is used on Linux.
Question 2
In Rapid STP, which port state forwards frames and learns MACs?
- Discarding
- Learning
- Forwarding
- Blocking
Show the answer
C. Forwarding — RSTP states are discarding, learning and forwarding; only forwarding passes user traffic.
Question 3
Signal strength drops along a long copper or fiber run. What is this called?
- Attenuation
- Crosstalk between adjacent pairs
- Jitter
- Latency
Show the answer
A. Attenuation — Attenuation is loss of signal over distance.
Question 4
A technician's theory is tested and proves wrong. What is the next step?
- Implement the original fix anyway and monitor the results
- Establish a new theory or escalate
- Document and close the ticket
- Reboot every switch
Show the answer
B. Establish a new theory or escalate — If the theory is not confirmed, form a new one or escalate (5.1).
Question 5
A user reports email, printing and Wi-Fi problems at once. What does the methodology recommend?
- Fix the easiest one and close the ticket
- Replace the user's PC
- Approach multiple problems individually
- Assume one root cause and skip testing
Show the answer
C. Approach multiple problems individually — Treat separate problems separately, even if they arrived together.