Which device, located in the Starboard Cargo Bay Equipment Shelf, provides a type 1 encryption boundary layer between the SIPR laptop, the unclassified Mission System, and INMARSAT equipment?

• A. KG-175
• B. KG-250
• C. KG-164
• D. KIV-7

Answer: (A)

The device you’re looking for serves as a Type 1 encryption boundary between networks carrying different classification levels and external links. In this setup, traffic from the SIPR laptop, the unclassified Mission System, and INMARSAT must cross a secure boundary, and that boundary is provided by a certified Type 1 crypto module. The KG-175 is designed specifically for this role, handling the encryption and decryption of data as it moves between those segments, ensuring confidentiality and integrity across the boundary. Its placement on the Starboard Cargo Bay Equipment Shelf aligns with shipboard security architectures that funnel boundary traffic through a single, NSA-approved crypto boundary device.

The other options are different cryptographic devices with roles that don’t match this boundary function in this configuration. The KG-164 and KG-250 are other NSA crypto products with distinct deployment profiles, and the KIV-7, while also a high-assurance crypto device, is used in different architectures and doesn’t represent the standard boundary device for this trio of networks here. That alignment with the described boundary function is why the KG-175 is the best answer.