Which term describes the network segmentation achieved through architectures in network security?

The term that describes network segmentation achieved through architectures in network security is isolation. Isolation refers to the practice of creating separate segments within a network to enhance security. By doing so, it limits the potential impact of security incidents and helps to contain threats. For example, if a particular segment of the network is compromised, isolation ensures that the attacker cannot easily access other segments, thereby protecting sensitive data and systems from further exposure.

Network segmentation through isolation can be achieved using various methods, including firewalls, virtual local area networks (VLANs), and demilitarized zones (DMZs). Each of these techniques allows organizations to define clear boundaries between different network areas, controlling traffic flow and minimizing the attack surface.

The other options, while relevant to network security, do not specifically pertain to the concept of network segmentation. Encryption refers to the process of encoding data to protect it from unauthorized access, access control involves the policies and measures to restrict access to networks and systems, and redundancy relates to the availability and reliability of network resources, ensuring that systems can continue to operate in the event of a failure. None of these terms capture the specific focus on segmentation that isolation does.