CompTIA Network+ Network+ Network Troubleshooting Methodology 2

Question 1

A technician is troubleshooting intermittent connectivity drops on a switch port. After checking cables and replacing them with known-good spares, the issue persists. What is the BEST next step?

Accepted Answer

Check the switch port statistics for errors and collisions

Answer

Replace the switch immediately

Answer

Reboot the connected workstation

Answer

Contact the ISP

Question 2

During troubleshooting, a technician confirms that a problem exists but cannot reproduce it consistently. Which troubleshooting step does this situation complicate most?

Accepted Answer

Test the theory

Answer

Identify the problem

Answer

Establish a theory of probable cause

Answer

Implement the solution

Question 3

A user reports they can reach local network resources but cannot browse the internet. A ping to 8.8.8.8 fails, but pinging the default gateway succeeds. What is the MOST likely cause?

Accepted Answer

The default gateway is misconfigured or the upstream route is broken

Answer

Incorrect subnet mask on the workstation

Answer

The NIC is faulty

Answer

DNS is not configured

Question 4

Which troubleshooting approach starts at the application layer and works toward the physical layer?

Accepted Answer

Top-down approach

Answer

Bottom-up approach

Answer

Divide and conquer approach

Answer

Follow-the-path approach

Question 5

After implementing a fix for a network issue, a technician verifies full functionality and then documents the solution. What critical step is MOST often skipped at this stage?

Accepted Answer

Implementing preventive measures

Answer

Testing the fix

Answer

Notifying affected users

Answer

Identifying root cause

Question 6

A technician uses the divide-and-conquer troubleshooting method. On which OSI layer does this approach typically begin?

Accepted Answer

Layer 3 – Network

Answer

Layer 1 – Physical

Answer

Layer 7 – Application

Answer

Layer 2 – Data Link

Question 7

When a technician documents a resolved network incident, which detail is LEAST important to include?

Accepted Answer

The technician's personal opinion of the network design

Answer

Root cause of the problem

Answer

Steps taken to resolve the issue

Answer

Changes made to prevent recurrence