CompTIA Network+ (N10-008) — Question 563

A network technician discovered multiple failed logins on a production server. Upon investigation, the technician determined that a client plugged a personal laptop in to the corporate LAN, which allowed malware on the laptop to probe the network. Which of the following would have prevented this unauthorized device?

Answer options

• A. Port security
• B. Bring your own device policy
• C. Patch management
• D. Changing default passwords

Correct answer: A

Explanation

Port security would have limited access to the network by controlling which devices can connect, thus preventing the unauthorized laptop from causing issues. A Bring Your Own Device policy does not inherently prevent unauthorized devices; it merely governs how personal devices can be used. Patch management ensures systems are updated but does not address unauthorized access directly. Changing default passwords helps secure devices but does not prevent rogue devices from connecting to the network.