The Oracle Reference Architecture (ORA) contains both horizontal and vertical architectural
layers. Which statements best describe the layers within ORA?
A.
Lavers only provide a means to partition the capabilities encompassed by ORA and have no
significance.
B.
Horizontal layers are used to depict that upper layers build on the capabilities provided by lower
layers
C.
Vertical layers are used to depict capabilities applied across all the horizontal layers.
D.
Horizontal layers are used to signify that the lower layers can be accessed only via the upper
layers.
E.
Vertical layers are used to depict enterprise-wide capabilities, whereas horizontal layers
departmental capabilities.
F.
Horizontal layers are stateful, whereas vertical layers are stateless.
Explanation:
B: The horizontal layers illustrate that upper layers build upon or use the capabilities
of
lower layers.
Examples: Shared Infrastructure, Information Management, Information Assets, Application
Infrastructure
C:Layers depicted vertically are orthogonal to the horizontal layers and apply across the
entire platform, working in conjunction with horizontal layers to provide a complete
solution.
Examples: Enterprise Development, Enterprise Security, Enterprise Management
Note: In order to promote modularity and encapsulation, an architecture will usually be
divided into layers. Each layer has a specific purpose and leverages technologies,
standards, and products designed specifically to address that purpose. Layers
generally build upon the layers below and provide benefits and capabilities to the
layers above.
The ORA diagram in the figure below illustrates the many aspects of enterprise computing
in the form of horizontal and vertical layers
