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350-701 Practice Question: In a Cisco ISE deployment, after a device passes…
In a Cisco ISE deployment, after a device passes posture assessment, ISE needs to dynamically change the VLAN assignment for the device. Which protocol or feature enables ISE to send a new authorization policy to the network access device without requiring the endpoint to reauthenticate?
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
✓
CoA (Change of Authorization)
Change of Authorization (CoA) allows ISE to send real-time authorization changes (e.g., VLAN change) to the NAD using RADIUS Disconnect or Change of Authorization messages, without requiring the client to reauthenticate.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
TrustSec SGT assignment
Why it's wrong here
TrustSec assigns SGTs but typically requires reauthentication for changes unless CoA is used.
- ✗
RADIUS Accounting
Why it's wrong here
RADIUS Accounting is used for logging and does not trigger authorization changes.
- ✓
CoA (Change of Authorization)
Why this is correct
Correct. CoA dynamically changes authorization attributes like VLAN or ACL.
- ✗
MAB
Why it's wrong here
MAB is an authentication method, not a mechanism for dynamic authorization changes.
Visual reference
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-701 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 350-701 exam.