CompTIA A+ 220-1102 (V14) Practice Question

The correct answer is to apply a privacy screen filter. A privacy filter is a physical security control that narrows the viewing angle of a monitor, making it difficult for anyone not sitting directly in front of the screen to see its contents. This directly mitigates the risk of shoulder surfing in a public-facing environment. While a software firewall and complex passwords are good security practices, they do not prevent an onlooker from viewing the screen. A keylogger is a type of spyware used to capture keystrokes and is a threat, not a security control.