Drag and drop each AAA function on the left to its matching description on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Verifies the identity of a user or device; Typically performed first in the AAA process
Determines what resources or services a user is allowed to access; Can use attributes like privilege level or ACLs
Collects and logs usage data for auditing or billing
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Authentication: Verifies the identity of a user or device
Authentication verifies identity; Authorization determines permitted actions; Accounting tracks usage for auditing or billing.
Quick reference
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.