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

The purpose of a demilitarized zone (DMZ) in network security serves as a critical buffer zone between the internal network and external networks, such as the internet. This architecture provides a layer of security by isolating the internal network from direct exposure to the outside world.

When a DMZ is implemented, it typically houses services that are designed to be publicly accessible, such as web servers, email servers, and DNS servers. These servers are exposed to the internet while the internal network, which holds sensitive data and resources, is protected behind an additional layer of security. This design helps to mitigate potential threats from external attacks, as any compromise of the services in the DMZ does not directly expose the internal network.

By using a DMZ, an organization can monitor and manage the traffic that enters and exits the network more effectively, enhancing the overall security posture. Furthermore, it allows for better control of access policies and the application of additional security measures specific to the services running in the DMZ.

In contrast, some of the options like creating a backup, providing secure storage for sensitive data, or enhancing the speed of data transmission do not align with the primary function of a DMZ. These options relate to different aspects of network management and security that