Which identification form is used by subscribers in this context?

• A. Common Access Card (CAC)
• B. Passport
• C. Driver's License
• D. Employee ID

Answer: (A)

In this context, secure access hinges on a government-issued smart card that serves as a credential for both identity and authentication. The Common Access Card is the standard for DoD subscribers, combining identity with cryptographic credentials that live on the card. It enables strong, two-factor authentication when you enter your PIN and use the card to log into DoD networks and facilities. Other forms like a passport, driver’s license, or employee ID simply verify identity visually and don’t provide the cryptographic credentials required to securely authenticate to government systems. That combination of identity and built-in authentication capability makes the Common Access Card the appropriate choice.