Certified Information Systems Security Professional (CISSP) Practice Exam 2025 – All-in-One Guide to Mastering Your Certification!

The use of two firewalls to screen a DMZ (Demilitarized Zone) is characteristic of a screened subnet architecture. In this configuration, one firewall is positioned to manage traffic between the internal network and the DMZ, while the second firewall is responsible for controlling access between the DMZ and the external internet. This setup creates an additional layer of security by isolating the internal network from potentially vulnerable services in the DMZ, where public-facing servers might reside.

The dual-firewall approach enhances security as it allows for more granular control over traffic. Each firewall can be configured with its own specific rules and policies, which can be adapted to safeguard the organizational network effectively while still permitting the necessary access to the DMZ.

In contrast, other architectures like the screened host architecture typically involve a single firewall with a DMZ configured behind it, which does not provide the same level of traffic management and protection. Single firewall architectures rely on one device to manage both incoming and outgoing traffic, potentially increasing risk. The dual-homed architecture involves a single host with multiple network interfaces, but it does not involve the dual-firewall setup that characterizes the screened subnet structure. Such distinctions clarify the unique aspects of the screened subnet architecture, highlighting its focus on utilizing two