What technology does Zscaler employ to inspect incoming and outgoing emails?

The correct answer highlights Zscaler's use of a Data Loss Prevention (DLP) system to inspect incoming and outgoing emails. DLP technology is specifically designed to monitor and control data exchanges to prevent sensitive information from being improperly shared or leaked. When it comes to emails, DLP examines content for various types of sensitive data, such as personally identifiable information (PII), credit card numbers, and corporate intellectual property.

By employing a DLP system, Zscaler can ensure that email communications remain secure, allowing organizations to enforce compliance with data protection regulations and internal policies. This capability is critical in safeguarding confidential information while allowing legitimate communications to occur without interruption.

Other technologies mentioned, while valuable in their own right, do not inherently focus on the inspection of email content for data leakage prevention. Advanced threat detection typically focuses on identifying malware and other threats but doesn't specifically target data exfiltration through email. A network firewall provides security by controlling traffic based on predetermined security rules, while encryption services are concerned with securing data in transit or at rest rather than inspecting email content. Thus, the DLP system stands out as the most relevant technology for this specific purpose.