CompTIA Network+ (N10-008) — Question 829

A customer calls the help desk to report that users are unable to access any network resources. The issue started earlier in the day when an employee rearranged the wiring closet. A technician goes to the site but does not observe any obvious damage. The statistics output on the switch indicates high CPU usage, and all the lights on the switch are blinking rapidly in unison. Which of the following is the MOST likely explanation for these symptoms?

Answer options

• A. The switch was rebooted and set to run in safe mode.
• B. The line between the switch and the upstream router was removed.
• C. A cable was looped and created a broadcast storm.
• D. A Cat 6 cable from the modem to the router was replaced with Cat 5e.

Correct answer: C

Explanation

The correct answer is C because a cable loop can create a broadcast storm, causing the switch to experience high CPU usage and all lights to blink rapidly. Options A and B do not explain the symptoms observed, and option D is unlikely to cause such immediate network resource issues.