SISE Network Access Device Administration Practice Question
When adding a network device to ISE, you select the 'TACACS+ Authentication Settings' checkbox. What is the impact of this action?
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
✓
It enables TACACS+ services for this device
Checking this box enables the device to participate in TACACS+ authentication and authorization flows managed by ISE.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It enables RADIUS for this device
Why it's wrong here
RADIUS settings are separate.
- ✓
It enables TACACS+ services for this device
Why this is correct
This is the prerequisite for TACACS+ processing.
- ✗
It forces the switch to use SNMP
Why it's wrong here
TACACS+ and SNMP are independent.
- ✗
It automatically configures the switch via CLI
Why it's wrong here
ISE does not push config via TACACS+; it only processes requests.
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
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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.