What is the first SDLC phase; which maps to the first two RMF steps (Categorization, Select Controls)? Response:

The Initiation phase is the first phase of the System Development Lifecycle (SDLC) where a system's need is identified, its purpose and scope are defined, and initial security considerations are established. This phase directly maps to the RMF's 'Categorize System' and 'Select Controls' steps, as understanding the system's purpose and data types is crucial for its categorization and control selection.

Categorization is an RMF step that occurs within the SDLC's Initiation phase, not an SDLC phase itself.

Implementation is a later SDLC phase where the system is built or acquired and security controls are put into place, following the Initiation phase.

Disposition is the final SDLC phase, occurring at the end of a system's lifecycle when it is retired or decommissioned.