What is the purpose of using a demilitarized zone (DMZ) in network architecture?

Using a demilitarized zone (DMZ) in network architecture primarily serves as a buffer zone between an internal network and external threats. This is achieved by isolating external-facing services from the internal network, which reduces the risk of direct attacks on internal resources. The DMZ typically contains servers that need to be accessible from the outside, such as web servers, email servers, and DNS servers, while safeguarding the internal network from potential intrusions.

By implementing a DMZ, organizations can ensure that even if external attackers compromise services located within the DMZ, they are still separated from the sensitive data and systems on the internal network. This layered security approach creates a barrier, ensuring that the internal environment remains protected even when certain services are exposed to the internet. This segmentation is crucial for enhancing overall network security and maintaining the integrity of the organization's critical systems.