CompTIA Network+ (N10-007) — Question 698

A switch at a remote site suddenly appears to be inaccessible. No configuration changes were made. An engineer confirms with the office attendant that the switch is powered on, and there are LEDs showing green and amber colors. However, the SFP for the fiber connection from the switch to the router shows no lighted LED. After replacing the cable and SFP with new ones, the LED still does not light up, and no connection is made. Which of the following is the MOST likely issue?

Answer options

• A. Disabled port
• B. Electromagnetic interference
• C. Incorrect gateway
• D. Hardware failure
• E. Wrong cable type
• F. Unresponsive service

Correct answer: D

Explanation

The most likely issue is a hardware failure, as indicated by the lack of a lit LED on the SFP even after replacing both the cable and SFP. The other options, such as a disabled port, electromagnetic interference, incorrect gateway, wrong cable type, and unresponsive service, would typically still allow for some form of connectivity or indication, which is not the case here.