Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
A demilitarized zone (DMZ) in a network architecture is typically associated with providing a buffer zone between the internal network and external sources like the internet. The primary characteristic of a DMZ is that it allows controlled access to external resources such as the internet, typically by placing web servers or other public-facing applications within the DMZ. This setup ensures that the internal network remains protected while allowing some level of interaction with the outside world through the firewall. Therefore, the characteristic most closely associated with the deployment of a DMZ is that Internet access through the firewall is allowed.
A demilitarized zone (DMZ) is typically implemented as a buffer zone or intermediary network between an organization’s internal networks and external or higher-level networks. In a common industrial control system (ICS) architecture, such as the Purdue model, Level 4 (Enterprise level) and above must communicate with Level 3 and below (Control levels) through the DMZ. This configuration helps ensure that external or less-trusted segments do not directly connect to the critical internal networks without passing through protective layers, thereby reducing the risk of unauthorized access or cyberattacks.
A is the correct Answer
Answer A - Level 4 systems must use the DMZ to communicate with Level 3 and below.