Which of the following is the best way to prevent data from being leaked from a secure network that does not need to communicate externally?

Containerization involves packaging applications and their dependencies in isolated environments, which can help secure applications from each other. However, it does not provide a complete solution for preventing data leaks from a secure network, as containerized systems may still be connected to external networks, leaving potential vulnerabilities for data breaches.

Virtualization allows multiple operating systems to run on a single physical server, providing flexibility and resource efficiency. While it can improve security through isolation of virtual machines, it does not inherently prevent data leakage from a secure network unless combined with additional security measures like an air gap.

Decentralization refers to distributing control and data across multiple locations or systems. While it can enhance resilience and reduce single points of failure, it does not specifically address data leakage concerns in a secure network. In fact, decentralization could potentially expose sensitive data across various nodes, increasing the risk of leaks.