Certified Incident Handler (ECIH) — Question 52

Lorenzo, a security professional in an MNC, was instructed to establish centralized authentication, authorization, and accounting for remote-access servers. For this purpose, he implemented a protocol that is based on the client-server model and works at the transport layer of the OSI model.
Identify the remote authentication protocol employed by Lorenzo in the above scenario.

Answer options

• A. SNMPv3
• B. RADIUS
• C. POP3S
• D. IMAPS

Correct answer: B

Explanation

The correct answer is B, RADIUS, which is designed for centralized authentication and operates at the transport layer. SNMPv3 is used for network management, POP3S is for secure email retrieval, and IMAPS is for secure email access, none of which focus on the centralized management of authentication, authorization, and accounting.