(ISC)2 Certified in Cybersecurity Practice Exam

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What is the purpose of a DMZ in network architecture?

  1. To create a backup of important files

  2. To isolate a network segment for hosting servers accessible from the internet

  3. To connect internal routers

  4. To restrict access to company emails

The correct answer is: To isolate a network segment for hosting servers accessible from the internet

The purpose of a DMZ, or Demilitarized Zone, in network architecture is to isolate a network segment specifically for hosting servers that need to be accessible from the internet while maintaining a layer of security between the internet and the internal network. This design allows organizations to protect sensitive internal resources by placing their external-facing services, such as web servers, email servers, and DNS servers, in the DMZ. By doing so, any attacks or breaches that target these accessible servers do not directly compromise the internal network. The DMZ acts as a buffer zone, effectively reducing the risk of unauthorized access to the private network while allowing legitimate access to necessary services. In contrast, creating backups of important files relates more to data management and disaster recovery, which does not directly involve the isolation of services. Connecting internal routers deals with routing and traffic management within a private network, rather than focusing on external access and security. Restricting access to company emails pertains to email security and management practices, which also falls outside the specific purpose of a DMZ. Therefore, the correct answer clearly defines the DMZ's role in maintaining a secure perimeter around external services while safeguarding internal systems.