Confidentiality means "the state of keeping or being kept secret or private". With RADIUS only the password is encrypted while the other information such as username, accounting information, etc are not encrypted. Encryption is "the process of converting information or data into a code, especially to prevent unauthorized access". So since RADIUS only encrypts the passwords, that means its the confidentiality is missing

Answer is correct. Remote Authentication Dial-In User Service (RADIUS) is a networking protocol that provides centralized authentication, authorization, and accounting (AAA) management for users who connect and use a network service. https://en.wikipedia.org/wiki/RADIUS#:~:text=Remote%20Authentication%20Dial%2DIn%20User,and%20use%20a%20network%20service.

Correct answer is D. By default, the traffic from RADIUS is not encrypted.

Selected Answer: D Please see the Wiki: https://en.wikipedia.org/wiki/RADIUS Remote Authentication Dial-In User Service (RADIUS) is a networking protocol that offers centralized authentication, authorization, and accounting (AAA) management for users who connect to and use a network service. D is the absolute answer.

Unlike TACACS+, RADIUS on its own provides no encryption of all traffic. It protects only a small part of the traffic, mainly the passwords.

Selected Answer: C C. Accounting When RADIUS is used to provide management access to a Wireless LAN Controller (WLC), the missing service is accounting. RADIUS mainly handles authentication and authorization for network access. Authentication checks the identity of the user or device, while authorization decides the amount of access granted to the authenticated entity. However, accounting, which includes tracking and recording network resource usage, is not usually provided by RADIUS in the context of management access to a WLC.

OK, but why it's missing confidentiality tho?

Selected Answer: D Copilot:When RADIUS is chosen to provide management access to the Wireless LAN Controller (WLC), the missing service is D. confidentiality12. RADIUS offers authentication, authorization, and accounting (AAA) services, but it does not natively provide encryption for the data that is being transmitted, which is what confidentiality means.