An OSC seeking Level 2 certification has a fully cloud-based environment.

The Shared Responsibility Matrix (Customer Responsibility Matrix) is the authoritative document that specifies which security responsibilities are owned by the OSC versus the Cloud Service Provider (CSP). This enables assessors to determine which CMMC practices apply to the OSC and which are inherited from the provider.

Exact extracts:

“External Service Providers (ESPs), including CSPs, must provide a Shared Responsibility Matrix that delineates customer versus provider responsibilities.”

“Assessors should request and review this matrix to determine practice applicability.”

Why other options are incorrect:

A: Zero Trust Architecture is a design framework, not a responsibility breakdown.

C: White papers are marketing/technical resources, not binding assignments of responsibility.

D: IAM Plans address access management, not overall shared responsibilities.