How many key engines does the Zscaler Firewall Module have?

In the Zscaler for Users – Engineer path, the Zscaler Cloud Firewall (Firewall Module in ZIA) is described as being built around four key engines. The training emphasizes that the firewall is not a single, monolithic filter but a set of parallel inspection engines that collectively provide advanced Layer 3/4 control, application and service awareness, DNS security, and inline threat prevention. These engines evaluate traffic simultaneously, and the most restrictive outcome is applied, aligning with Zscaler’s broader “parallel processing” model for policy enforcement.

The curriculum highlights that this multi-engine design allows Zscaler to go beyond traditional firewalls, combining user and application awareness with security controls such as IPS and DNS-based protection within the same cloud-native enforcement stack. Having four coordinated engines enables granular, identity-based firewall policies that work for users regardless of location, without the need for separate appliances. Options suggesting two, three, or five engines do not match the way the Firewall Module is presented in the ZDTE/EDU-202 materials. Therefore, the correct answer, and the number you are expected to know for the exam, is four.

===========