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Study the full AAA explanation →Question 479 of 2,015
Quick Answer
The answer is NAS-Port is Attribute 5. This is correct because RADIUS attribute numbers are standardized under RFC 2865, where each attribute is assigned a unique numeric identifier to convey specific authentication, authorization, and accounting information between a Network Access Server and a RADIUS server. For the Cisco ENCOR 350-401 exam, you must be able to map common attributes like User-Name (1), NAS-IP-Address (4), Service-Type (6), and Framed-IP-Address (8) to their numbers, as drag-and-drop questions frequently test this mapping. A common trap is confusing NAS-Port (5) with NAS-IP-Address (4) or Framed-IP-Address (8), so remember that port numbers often start with 5 in networking contexts. To lock it in, use this mnemonic: "One User, Four NAS IP, Five Port, Six Service, Eight Framed IP."
CCNP AAA, RADIUS, and TACACS+ Practice Question
This 350-401 practice question tests your understanding of aaa, radius, and tacacs+. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Drag and drop each RADIUS attribute on the left to its correct attribute number on the right.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
User-Name: Attribute 1
RADIUS attribute numbers are standardized: User-Name is 1, NAS-IP-Address is 4, Service-Type is 6, Framed-IP-Address is 8, and NAS-Port is 5.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 350-401 questions on access control and AAA configuration.
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FAQ
Questions learners often ask
What does this 350-401 question test?
AAA, RADIUS, and TACACS+ — This question tests AAA, RADIUS, and TACACS+ — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: User-Name: Attribute 1 — RADIUS attribute numbers are standardized: User-Name is 1, NAS-IP-Address is 4, Service-Type is 6, Framed-IP-Address is 8, and NAS-Port is 5.
What should I do if I get this 350-401 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 350-401 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Drag and drop each RADIUS attribute name on the left to its matching attribute number on the right.
medium- ✓ P1.User-Name: 1
- ✓ P2.NAS-IP-Address: 4
- ✓ P3.Service-Type: 6
- ✓ P4.Framed-IP-Address: 8
- ✓ P5.Framed-Route: 22
Why P1: RADIUS attribute numbers are standardized: User-Name=1, NAS-IP-Address=4, Service-Type=6, Framed-IP-Address=8, and Framed-Route=22.
Last reviewed: Jun 18, 2026
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.
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