As information security is a business issue and not only protects information and information systems but also supports business and organizational objectives, enterprise architecture is a means for security professionals to understand the organizational structure and processes.
Enterprise Architecture Frameworks
The Zachman Framework, created by John Zachman in the 1980s, then working for IBM, is NOT a methodology for constructing an enterprise architecture but a tool for describing the enterprise.
The Open Group Architecture Framework (TOGAF), developed starting in 1995 by The Open Group, is a framework for enterprise architecture. It provides a set of tools for developing a broad range of different architectures, e.g. business, applications, data, and technical architecture.
McKinsey 7-S Framework