Introduction to layered approach
Dual Control
Layer 9 - End Users - Checkered
Layer 8 - Governance - Purple
Layer 7 - Management - Blue
Layer 6 - Logic - Green
Layer 5 - Access/Security Gateway - Yellow
Layer 4 - Application Infrastructure - Orange
Layer 3 - Data Management - Red
Layer 2 - Operating and Network Systems - Brown
Layer 1 - Processors & Devices - Black
References

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