A security consultant is working with a client that wants to physically isolate its secure systems. Which of the following best describes this architecture?

An air-gapped system is physically isolated from all other networks, including the internet. This isolation creates a robust security barrier, making it extremely difficult for external threats to access or compromise the secure systems. This architecture is often used for highly sensitive data or critical infrastructure where the risk of cyberattack is unacceptable. SDN (Software-Defined Networking) focuses on network management and programmability, not physical isolation. Containerized environments encapsulate applications but still rely on underlying network connectivity. Highly available systems are designed for uptime and redundancy, which doesn't inherently mean physical isolation from other networks.