CompTIA Security+ SY0-701 Practice Question

The correct answer requires a physical object that the user must possess in order to authenticate, known as 'something you have'. Unlike knowledge-based factors ('something you know') like passwords, or inherence factors ('something you are') like biometrics, possession factors provide a tangible means of user authentication. This kind of factor can be easily demonstrated by presenting the object and, therefore, serves as a strong layer of security when used as part of multifactor authentication.