Which term refers to a physical or logical authentication device?

• A. Token
• B. Tombstone
• C. Topology
• D. Top-Down Approach

Answer: (A)

The concept being tested is the thing you possess that proves who you are during authentication. A token is exactly that—a device used to authenticate, either as a physical hardware device (like a hardware token) or a software-based token (an app that generates codes). These tokens often provide a one-time code or hold cryptographic data that the system can verify, making them a common factor in multi-factor authentication (something you have). The other terms don’t describe an authentication device: tombstone isn’t related to proving identity; topology refers to how network components are arranged; and a top-down approach is a design or management method, not an authentication device.