scope:

An information security architecture is made up of several components. Each component in the architecture focuses on establishing acceptable levels of control. These controls are then applied to the operating environment of an organization. Functionally, information security architecture combines technical, practical, and cost-effective solutions to provide an adequate and appropriate level of security.
Information Security Architecture: An Integrated Approach to Security in the Organization details the five key components of an information security architecture. It provides C-level executives with an understanding of the requirements for a strategic plan for security within the organization.