In Annex F, which function verifies a user's identity?

In Annex F, which function verifies a user's identity?

• A. Authentication
• B. Authorization
• C. Accounting
• D. Auditing

Answer: (A)

Verifying who someone is falls under authentication—the process of proving a user’s identity. This step answers the question “Are you who you claim to be?” through methods like passwords, tokens, or biometrics. Once identity is established, the system can determine what that user is allowed to do (authorization). Other functions, such as accounting, track what was done for billing or resource use, and auditing involves reviewing those records for security or compliance. So, the function that confirms identity is authentication.

Verifying who someone is falls under authentication—the process of proving a user’s identity. This step answers the question “Are you who you claim to be?” through methods like passwords, tokens, or biometrics. Once identity is established, the system can determine what that user is allowed to do (authorization). Other functions, such as accounting, track what was done for billing or resource use, and auditing involves reviewing those records for security or compliance. So, the function that confirms identity is authentication.