Which of the following publications serves as a guide for the selection of security controls? Response:

FIPS 199 defines security categorization, and NIST SP 800-60 guides system categorization based on information types, but these are precursors to control selection rather than guides for selecting the controls themselves.

FIPS 200, "Minimum Security Requirements for Federal Information and Information Systems," establishes the minimum security requirements and the process for selecting controls. NIST SP 800-53, "Security and Privacy Controls for Information Systems and Organizations," then provides the comprehensive catalog of security and privacy controls from which to select. Together, they form the foundation for control selection.

Organizational policy and procedures implement the chosen controls and overarching security strategy, but they are not the primary guide for selection of the controls themselves at a foundational level.

A system security plan documents the chosen controls, and a security assessment report evaluates their effectiveness, but neither serves as the initial guide for selecting the controls.