Which of the following utilizes separate virtual networks for testing suspicious or malicious files?

The correct answer is Sandboxing, as this technique specifically involves creating separate virtual environments, often referred to as "sandboxes," to execute potentially harmful code or files in a controlled manner. This allows security analysts to observe the behavior of suspicious files without the risk of them impacting the broader system or network. By isolating the files in this dedicated environment, any malicious actions taken by the code are contained, ensuring that the rest of the system remains unaffected.

Sandboxing serves a crucial role in cybersecurity by enabling thorough analysis and testing of potentially harmful software. It helps in understanding how a file behaves, what kind of network traffic it generates, and what system changes it attempts to make, all while protecting a real environment from any possible damage. This strategy is essential for detecting zero-day vulnerabilities and advanced threats, which might not be recognized by traditional security measures.

The other concepts, while related to security and virtualization, do not specifically focus on the isolation of suspicious files for testing in the same manner as sandboxing does. Isolation may pertain to broader contexts of keeping different processes or data streams separate, while virtualization focuses on creating virtual versions of hardware or software resources. Emulation involves mimicking one system's functions on another but doesn't inherently provide a contained environment for testing