CompTIA CySA+ Practice Test

Which of the following best describes the third network connected to a triple-homed firewall that connects to the internet and a private network?

1. DMZ

2. Subnet

3. NIDS

4. GPO

The correct answer is: DMZ

A DMZ, or Demilitarized Zone, refers to a distinct network segment that acts as a buffer between an untrusted external network (such as the internet) and a trusted internal network (like a private network). In the context of a triple-homed firewall, which has three network interfaces—one connected to the internet, one to a private network, and one generally meant for public-facing services—the DMZ serves a crucial role. The purpose of the DMZ is to host external services, such as web servers, email servers, or DNS servers, that need to be accessible from the internet while still protecting the internal private network. By placing these services in a DMZ, an organization can reduce the risk of exposing its internal systems to potential threats originating from the internet. Therefore, the third network connected to a triple-homed firewall that interfaces with both the internet and a private network is accurately described as a DMZ. In contrast, a subnet refers to a range of IP addresses within a larger network and isn’t specifically tied to the security model described. NIDS, or Network Intrusion Detection Systems, are tools used for monitoring network traffic for suspicious activity, while GPO, or Group Policy Object, pertains to a configuration mechanism used