System security

Correct Answer: Full disk encryption

Full disk encryption is the most effective way to protect sensitive data on a mobile device. Here's why:

Full disk encryption secures all data stored on the device by converting it into unreadable code. This method protects the entire storage system, including system files, user data, and temporary files. If the device is lost or stolen, the encrypted data remains inaccessible to unauthorized users.

Setting a complex password is important but not as comprehensive as full disk encryption. It primarily protects against unauthorized access to the device interface but doesn't secure the data if the storage is physically removed.

Installing antivirus software helps protect against malware but doesn't directly secure stored data from physical access or theft.

Using a VPN connection secures data in transit over networks but doesn't protect data stored on the device itself.

While all these methods contribute to overall device security, full disk encryption provides the most robust protection for sensitive data stored on a mobile device.

Correct Answer: Disable USB ports by default and allow only authorized USB drives

Disabling USB ports and allowing only authorized USB drives minimizes the risk of malware being introduced via USB drives. Inspecting USB drives for physical damage does not address the malware risk. Allowing only encrypted USB drives does not guarantee they are free from malware. Disabling all external storage devices may be impractical. Allowing only USB drives provided by the company and storing them in a secure location may not prevent an employee from unknowingly spreading malware.

Correct Answer: Malware infection; Perform a full system scan and remove any detected threats

The symptoms of slow computer performance and multiple pop-ups appearing on the screens are strong indicators of a malware infection. Malware can consume system resources, causing slowdowns, and often displays intrusive pop-up advertisements. The best course of action is to perform a full system scan using up-to-date antivirus software to detect and remove any malware threats. Outdated software, while a potential security risk, would not typically cause pop-ups. Overheating can lead to slowdowns but wouldn't cause pop-ups. Insufficient RAM can result in poor performance but is not directly related to pop-ups.