Which keylogger is a hardware device placed between the keyboard and the computer, requiring no software, and records keystrokes?

Which keylogger is a hardware device placed between the keyboard and the computer, requiring no software, and records keystrokes?

• A. External Keylogger
• B. PS/2 and USB Keylogger
• C. Acoustic/CAM Keylogger
• D. Bluetooth Keylogger

Answer: (A)

The main idea here is hardware interception. A hardware keylogger is a physical device that sits between the keyboard and the computer and records keystrokes without needing any software on the target machine. The term that best describes this inline, no-software approach is the External Keylogger. It’s designed to be placed between the keyboard cable and the computer to capture every keystroke as it passes through, storing it for later retrieval. Other options describe different methods or specifics: a device tied to PS/2 or USB interfaces is still hardware, but it’s a specific interface variant rather than the general concept of an inline, no-software keylogger; acoustic/CAM keyloggers rely on sound or video to infer keystrokes, not on intercepting the keyboard signal; Bluetooth keyloggers capture wireless keystrokes and aren’t the classic inline hardware device between keyboard and PC.

The main idea here is hardware interception. A hardware keylogger is a physical device that sits between the keyboard and the computer and records keystrokes without needing any software on the target machine. The term that best describes this inline, no-software approach is the External Keylogger. It’s designed to be placed between the keyboard cable and the computer to capture every keystroke as it passes through, storing it for later retrieval.

Other options describe different methods or specifics: a device tied to PS/2 or USB interfaces is still hardware, but it’s a specific interface variant rather than the general concept of an inline, no-software keylogger; acoustic/CAM keyloggers rely on sound or video to infer keystrokes, not on intercepting the keyboard signal; Bluetooth keyloggers capture wireless keystrokes and aren’t the classic inline hardware device between keyboard and PC.