Which term means communications that require safeguarding?

• A. External communication
• B. Coordination
• C. Signal check
• D. Classified

Answer: (D)

Classified is the term that signals communications must be safeguarded. When information is labeled as classified, it means its disclosure could harm national security or mission objectives, so access is restricted and it must be handled, stored, and transmitted only through approved, secure channels and to individuals with the appropriate clearance and need to know.

External communication, coordination, and a signal check describe the type of interaction, the process, or the status of a signal, but they don’t inherently indicate that the information needs protection. External communication might be with partners or other units, coordination is about aligning actions, and a signal check is simply confirming that a communication link is working. None of those imply the mandatory safeguarding required by classification.