CompTIA Network+ (N10-009) — Question 137

A customer lost the connection to the telephone system. The administration console is configured with multiple network interfaces and is connected to multiple switches. The network administrator troubleshoots and verifies the following:
The support team is able to connect remotely to the administration console.
Rebooting the switch shows solid link and activity lights even on unused ports.
Rebooting the telephone system does not bring the system back online.
The console is able to connect directly to individual modules successfully.
Which of the following is the most likely reason the customer lost the connection?

Answer options

• A. A switch failed.
• B. The console software needs to be reinstalled.
• C. The cables to the modules need to be replaced.
• D. A module failed.

Correct answer: A

Explanation

The most likely reason for the loss of connection is that a switch failed, as indicated by the solid link and activity lights on unused ports after a reboot, suggesting that the switch is operational but may not be routing traffic correctly. The other options, such as needing to reinstall console software or replacing cables, do not explain the inability to connect to the telephone system, and a module failure would likely prevent the console from connecting to the individual modules successfully.