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350-401 Practice Question: Drag and drop the steps of the TACACS+…
Drag and drop the steps of the TACACS+ authentication process into the correct order, from first to last.
Answer choices
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Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Client sends START packet to TACACS+ server
TACACS+ uses TCP and encrypts the entire packet. It separates authentication, authorization, and accounting. The server sends a GETUSERNAME prompt first, then GETPASSWORD, and finally an ACCEPT or REJECT.
Quick reference
AAA Protocol Comparison
| 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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JA
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.