Four level pyramid
Level 1 ( top level ) - Business
Level 2 - Data
Level 3 - Applications
Level 4 - Technical Infrastructure
Level 1 - Business, is drived by Data Level
Level 2 - Data, is supported by Applications
Level 3 - Applications, is supported by Technical Infrastructure
Security is present throughout all levels
Level 1 (Business) and Level 2 (Data) are business driven
Level 3 (Applications) and Level 4 (Technical Infrastructure) are technology driven