The illustration shows layout and relationship between the tiers created in Oracle Cloud Infrastructure.
The illustration is comprised of three vertical rectangles nested within one another. The outermost rectangle is labeled tenancy. The rectangle within it is labeled networks compartment, solution virtual cloud network. The innermost rectangle is labeled compartments.
There are four tiers represented within compartments as horizontal rectangles. The tiers are labeled shared services, admin, business logic, and database. Striped vertically through the tiers are three rectangles that represent availability domains in the region, labeled one, two and three.
More information on the tiers represented in this illustration is in the text that follows this diagram.