Final answer:
The Personally Identifiable Information (PII) stored on mobile devices such as laptops, cell phones, and PDAs is generally more vulnerable than that on non-portable devices. This is due to the higher risk of loss or theft and the potential for unsecured connections to public Wi-Fi networks.
Step-by-step explanation:
PII stands for Personally Identifiable Information. PII for mobile devices such as laptops, cell phones, and PDAs are generally more vulnerable than non-portable devices. This is because portable devices are more likely to be lost or stolen, and their small size makes them easier to misplace or steal. Additionally, mobile devices often connect to public Wi-Fi networks, which can be less secure than private networks.