An organization experiences data loss after several employees traveled to an area that is well-known for corporate espionage. The employees always used VPNs when connected to the hotel Wi-Fi, logged off their machines when not in use, and kept their doors locked when leaving their devices unattended. Which of the following will best prevent data loss events in the future?

Data sanitization is the process of securely erasing data from storage devices to prevent unauthorized recovery. While important for data security, it is more relevant when devices are being decommissioned or recycled rather than preventing data loss events during active device usage.

A Web Application Firewall (WAF) is designed to protect web applications from various attacks, such as SQL injection and cross-site scripting. While crucial for web security, a WAF does not directly address the issue of preventing data loss events related to device security and data encryption.

Split tunneling is a networking configuration that allows remote users to access both a secure VPN tunnel and a public network simultaneously. While it can impact network security, it is not directly related to preventing data loss events on individual devices through encryption measures like FDE.