Why does Zscaler DLP use multiple levels of inspection for file types?

Zscaler DLP (Data Loss Prevention) employs multiple levels of inspection for file types primarily to prevent users from bypassing data protection policies by simply changing file extensions. This approach recognizes that altering a file's extension does not necessarily change its content or potential risk. By inspecting files at various levels, Zscaler can analyze the actual data within the files—regardless of their extensions—to ensure that sensitive information is appropriately identified and protected.

This thorough inspection process plays a crucial role in maintaining secure environments and upholding compliance with data protection regulations, as it detects threats that could be disguised by manipulated file types. While other options may address different aspects of data handling or user experience, the fundamental goal of DLP is to safeguard sensitive data effectively, which is best achieved through in-depth inspection methods.