Image Courtesy: Mark Richards
There are four architecture domains that are commonly accepted as subsets of an overall Enterprise Architecture, all of which the TOGAF standard is designed to support:
The Business Architecture defines the business strategy, governance, organization, and key business processes
The Data Architecture describes the structure of an organization's logical and physical data assets and data management resources
The Application Architecture provides a blueprint for the individual applications to be deployed, their interactions, and their relationships to the core business processes of the organization
The Technology Architecture describes the logical software and hardware capabilities that are required to support the deployment of business, data, and application services; this includes IT infrastructure, middleware, networks, communications, processing, standards, etc.