Infrastructure and security architecture

Infrastructure architecture is one architecture domain that form the pillars of EA. It describes the structure of the technology infrastructure of the enterprise. It includes the nodes of hardware, the infrastructure applications that run on them, the infrastructure services they offer, the protocols, and the networks connecting applications. Infrastructure architecture also addresses issues pertaining to performance, resilience, storage and backup.

What are the principles of infrastructure domain?

Principle	Summary
Requirements-based change	Changes to IT applications are made in response to business needs only
Responsive change management	Changes to enterprise landscape are implemented in a timely fashion.
Control technical diversity	Technological diversity is controlled to minimize the non-trivial cost of maintaining expertise in and connectivity between multiple processing environments.
Interoperability	IT infrastructure should conform...