Zscaler PageRisk, specifically the Page Risk Index, is the proprietary scoring capability used in ZIA to evaluate the risk of web pages dynamically. Instead of relying only on static URL blocklists, PageRisk uses a multi-data algorithm that considers page content and domain characteristics. Page-content signals include risky scripts, suspicious iFrames, XSS indicators, vulnerable controls, and other active content. Domain signals include reputation, hosting location, age, and relationships to risky top-level domains. The verified answer is Option D (Zscaler applies a multi data algorithm to the web page) because PageRisk is the Zscaler technology used for real-time website risk scoring.

Why the other options are incorrect:

A. Zscaler licenses a PageRisk Feed from a 3rd party: A third-party PageRisk feed would be externally sourced reputation; the Zscaler answer is its own multi-data web-page algorithm.

B. It applies deobfuscation to all data: Deobfuscation can reveal hidden script behavior, but PageRisk uses a broader multi-signal algorithm.

C. It is the RSA Security algorithm: RSA is a cryptographic/public-key algorithm family, not Zscaler web-page risk scoring.