The scenario describes a hybrid architecture. The web application, hosted by a third-party vendor and accessed over the internet, represents a logical location from the Organization Seeking Certification (OSC) perspective. The OSC interacts with the application's interface, not its physical hardware. Conversely, the document storage servers are explicitly stated to be maintained "within its network," which constitutes a physical location under the OSC's direct or indirect control. The employee's action of uploading a document requires interaction with both the logical application front-end and the physical storage back-end.

B. A secure area within the OSC’s data center: This is incomplete as it only addresses the document storage servers and completely ignores the externally hosted web application.
C. The physical location of their internet-connected devices: This is incorrect because it focuses on the user's endpoint device, not the system components (application and storage) that are the subject of the interaction.
D. The physical location of the vendor’s data center: This is incomplete as it only addresses the web application's location and ignores the OSC's internal servers used for document storage. ---

1. Cybersecurity Maturity Model Certification (CMMC) Level 2 Scoping Guide, Version 2.0 (December 2021).

Section 2.3, "Categorization of Assets," and Section 2.4, "Scoping of External Service Providers (ESPs)": This guide establishes the framework for identifying and categorizing assets within an assessment scope. The OSC's servers are "CUI Assets" within their physical or logical boundary. The vendor's web application is an asset managed by an External Service Provider (ESP), which is treated as a distinct logical component that processes, stores, or transmits CUI. The interaction described involves both asset types.

2. CMMC Assessment Process (CAP) for CMMC Level 2, Version 2.0 (December 2021).

Section 2.3, "Scoping": This section details that the assessment scope must be defined by identifying "all CMMC assets that will be assessed." It clarifies that the scope boundary includes physical facilities, system components, and networks. This supports the distinction between the physical location of the OSC's servers and the logical nature of the external web application service.