SISE Network Access Device Administration Practice Question
A network engineer reports that they can log into a switch via TACACS+, but cannot run any commands. What is the most likely cause?
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
✓
The Command Set is missing or not assigned in the Authorization Policy
If authorization is enabled but no command set is assigned, ISE returns a 'deny' for all commands by default.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The Command Set is missing or not assigned in the Authorization Policy
Why this is correct
Authorization failed for the command execution phase.
- ✗
The switch is not configured for 'aaa authorization commands'
Why it's wrong here
The switch is querying ISE, so authorization is configured.
- ✗
The shell profile lacks privilege level configuration
Why it's wrong here
Privilege levels allow login but not command execution if commands are restricted.
- ✗
The user is not in the correct Identity Store
Why it's wrong here
Authentication succeeded, so the identity store is correct.
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.
About these practice questions
This SISE question is part of Courseiva's 322-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Cisco exam blueprint
This SISE 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 SISE exam.