Which security devices prevent unauthorized access to USB ports?

Which security devices prevent unauthorized access to USB ports?

• A. Port blockers
• B. Keyboard locks
• C. Cable locks
• D. USB locks

Answer: (D)

Securing USB interfaces to prevent data transfer or malware introduction is about limiting hardware access. USB locks are designed specifically for this purpose: they physically secure USB ports with a keyed or otherwise controlled lock, so unauthorized devices cannot be plugged in or accessed without the proper credential. This directly blocks both data exfiltration and the risk of malware being introduced through USB devices, making it the most appropriate solution for controlling access to USB ports. Other options don’t target the USB ports themselves. Keyboard locks protect the keyboard and won’t stop someone from using a USB port. Cable locks are meant to secure devices to prevent theft, not to control the use of USB interfaces. Port blockers exist in various forms, but USB locks are the standard, purpose-built mechanism for locking down USB ports.

Securing USB interfaces to prevent data transfer or malware introduction is about limiting hardware access. USB locks are designed specifically for this purpose: they physically secure USB ports with a keyed or otherwise controlled lock, so unauthorized devices cannot be plugged in or accessed without the proper credential. This directly blocks both data exfiltration and the risk of malware being introduced through USB devices, making it the most appropriate solution for controlling access to USB ports.

Other options don’t target the USB ports themselves. Keyboard locks protect the keyboard and won’t stop someone from using a USB port. Cable locks are meant to secure devices to prevent theft, not to control the use of USB interfaces. Port blockers exist in various forms, but USB locks are the standard, purpose-built mechanism for locking down USB ports.