Repair of cryptographic equipment will be accomplished in accordance with which documents?

• A. CMS-5 & CMS-21
• B. CMS-21 & NTP-4
• C. COMDTINST 5400.7D
• D. S2241.5

Answer: (A)

Understanding where repair procedures for cryptographic equipment are defined helps you see why this pair is the best answer. CMS-5 and CMS-21 are the documents that govern how cryptographic gear is serviced: who is qualified to repair, where repairs are conducted, and the steps and documentation required to keep the equipment secure throughout maintenance. CMS-5 lays out responsibilities and the overall workflow for crypto equipment management, while CMS-21 provides the detailed repair and testing processes to ensure the device returns to service in a validated, compliant state. Together, they ensure repairs are performed by authorized personnel using approved methods and proper custody of sensitive material.

Other documents focus on related but broader or different areas. COMDTINST 5400.7D deals with security programs in a general sense and isn’t the specific guide for crypto repair procedures, while S2241.5 and NTP-4 cover topics outside the precise repair and validation workflow for cryptographic equipment.