Episode 70: On-Premises, Centralized, and Decentralized Architectures (Domain 3)

Security must adapt to the architecture of the environment it protects, and that starts with understanding how infrastructure is organized. In this episode, we compare on-premises, centralized, and decentralized architectures, explaining the security implications of each. Centralized models offer streamlined control, simpler updates, and more consistent enforcement—but they also concentrate risk in a single point of failure. Decentralized architectures distribute resources and decision-making, improving resilience but making visibility, auditing, and access management more complex. On-prem environments offer complete control but require heavy resource investment and maintenance, while cloud and hybrid models shift responsibilities and require coordination across multiple layers. We also touch on containerization and virtualization, showing how infrastructure abstraction can simplify deployment but must be paired with strong segmentation and orchestration controls. Each model offers trade-offs, and understanding those is key to designing a defensible, adaptable system.

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