CompTIA Network+ (N10-007) — Question 530

A technician installed a new fiber optic cable to connect two sites. Although there is a link light on the port at each site, the customer reports traffic is dropping intermittently. Which of the following should the technician do NEXT to troubleshoot the issue?

Answer options

• A. Check the interfaces for CRC errors.
• B. Check for a VLAN mismatch.
• C. Check for a TX/RX reverse on the connector.
• D. Check that the pinout is correct.

Correct answer: A

Explanation

Checking for CRC errors is crucial because they indicate issues with data integrity on the connection, which could lead to dropped traffic. While a VLAN mismatch or TX/RX reversal could also cause problems, the presence of link lights suggests a more fundamental issue with data transmission, making CRC error checks the most immediate step. Verifying the pinout is important, but it is less likely to be the issue if the link lights are functioning.