What is the main purpose of Sandbox functionality?

Cloud Sandbox is built for unknown and suspicious files, especially when static signatures are not enough. The file is detonated in an isolated environment so Zscaler can observe behavior and assign a verdict before allowing it to reach users. Option C (Identify Zero-Day Threats) is correct because sandboxing is most valuable for identifying zero-day threats and advanced malware behavior.

Why the other options are incorrect:

A. Block malware that we have previously identified: Known-malware blocking is signature/reputation enforcement. Cloud Sandbox adds value by analyzing unknown files before a known signature exists.

B. Build a test environment where we can evaluate the result of policies: A test environment for policy evaluation is a lab function. Cloud Sandbox is a malware detonation and behavior-analysis service.

D. Balance threat detection across customers around the world: Balancing detection across customers describes cloud-scale operations. Sandbox’s student-level purpose is to detonate and classify suspicious files.