CMMC Domain

A CMMC domain is a grouping of related cybersecurity practices. The CMMC framework organizes its requirements into 14 domains such as Access Control (AC), Incident Response (IR), System and Communications Protection (SC), and Risk Assessment (RA). Each domain covers a specific area of cybersecurity.

Domains help you organize your compliance efforts by topic area. Rather than tackling 110 requirements randomly, you can work through them domain by domain — completing all Access Control requirements, then moving to Audit and Accountability, and so on.

Why It Matters

Organizing your CMMC implementation by domain makes the effort more manageable and ensures you don't miss related requirements. It also helps you assign responsibilities — your network team handles one set of domains, your HR handles another.