A Demilitarized Zone (DMZ) serves as a buffer zone between an internal network and the external world, particularly the internet. Its primary objective is to segregate devices and services that face external traffic from the more secure internal environment, thus enhancing overall network security.
This configuration typically involves placing public-facing servers, such as web and email servers, within the DMZ. By isolating these servers, organizations limit the potential access that external threats could have to sensitive internal systems. If an attacker compromises a server in the DMZ, they are still unable to access the internal network directly, which reduces the likelihood of breaching critical resources.
In contrast, the other choices do not accurately capture the essence of a DMZ's function. While preventing unauthorized access (as stated in one choice) is a general goal of network security, a DMZ specifically focuses on creating a controlled environment for exposed services rather than blocking all access. The option regarding creating a backup system pertains to data management rather than network architecture, and enhancing internet connection speeds is unrelated to the security measures DMZs are designed to provide. Thus, the purpose of a DMZ centers on effectively segregating and securing devices, which allows for improved overall security posture while still facilitating necessary interaction