Question 45 of 978
350-701 Practice Question: Secure Network Access, Visibility and Enforcement
An engineer is troubleshooting a user who cannot access the network after successful 802.1X authentication. The user's PC receives an IP address from DHCP, but cannot reach the internet. The switch port is in the correct VLAN (10) after authentication. The ISE posture policy requires the user to install a corporate certificate, but the user skipped that step. What is the most likely cause of the internet access failure?
⚠ Common exam trap
Cisco often tests the distinction between authentication success and posture compliance; the trap here is that candidates assume a successful 802.1X authentication and DHCP lease guarantee full network access, overlooking the fact that ISE can dynamically re-VLAN the port via CoA based on posture policy results.
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 ISE posture policy returned 'NonCompliant' and ISE applied a Change of Authorization (CoA) to place the port in a remediation VLAN
The ISE posture policy requires a corporate certificate, and since the user skipped that step, the endpoint is marked as 'NonCompliant'. ISE then sends a Change of Authorization (CoA) to the switch, which dynamically moves the port from the authorized VLAN (10) to a remediation VLAN. This remediation VLAN typically has restricted access, such as no internet connectivity, while still allowing DHCP to assign an IP address from that VLAN's scope.
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 user is not logged into the domain
Why it's wrong here
Domain login is not required for internet access.
- ✗
The switchport is still in the default VLAN
Why it's wrong here
The stem states the port is in VLAN 10 after authentication.
- ✗
The DHCP server does not have a scope for VLAN 10
Why it's wrong here
The user received an IP address from DHCP, so the scope is available.
- ✓
The ISE posture policy returned 'NonCompliant' and ISE applied a Change of Authorization (CoA) to place the port in a remediation VLAN
Why this is correct
ISE can use CoA to dynamically move the port to a remediation VLAN with no internet access.
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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Last reviewed: Jul 4, 2026
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.
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