The answer is that the RADIUS server is not sending the dACL attribute in the Access-Accept packet. Even when an authorization policy in Cisco ISE correctly applies a downloadable ACL, the switch enforcing 802.1X only receives the filter if the RADIUS message includes the dACL name—typically as a Cisco-AV-Pair attribute like "ip:inacl#100=...". Without this attribute in the Access-Accept, the switch defaults to a deny-all stance, leaving the user authenticated but unable to reach the internet. On the Cisco SCOR 350-701 exam, this scenario tests your understanding of how RADIUS attributes are actually transmitted versus how policies are configured; a common trap is assuming a policy applied in ISE guarantees the switch receives it. Remember: a policy applied is not a packet sent. For a quick memory tip, think "dACL must travel in the Access-Accept packet—if it’s not in the RADIUS reply, the switch has no filter to apply."
350-701 Practice Question: Secure Network Access, Visibility and Enforcement
This 350-701 practice question tests your understanding of secure network access, visibility and enforcement. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A company uses Cisco ISE for network access control. Users connecting via wired 802.1X are successfully authenticated but cannot reach the internet. The administrator checks the authorization policy and notices that the correct dACL is being applied. What is the most likely cause of the issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The RADIUS server is not sending the dACL attribute in the Access-Accept
The most likely cause is that the RADIUS server (ISE) is not sending the dACL attribute in the Access-Accept packet. Even though the authorization policy applies a dACL, if the RADIUS message does not include the dACL name (e.g., Cisco-AV-Pair = "ip:inacl#100=...") or the switch does not receive it, the switch cannot enforce the filter, leaving the user authenticated but with no internet access due to default deny-all behavior.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 switchport is configured as dynamic desirable
Why it's wrong here
Switchport mode affects trunking, not dACL application.
✓
The RADIUS server is not sending the dACL attribute in the Access-Accept
Why this is correct
If the dACL is not included in the RADIUS response, the switch will not apply it.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The switch port MTU is set to 1500 bytes
Why it's wrong here
MTU settings affect packet fragmentation, not the application of dACLs.
✗
ISE is out of licenses for endpoint devices
Why it's wrong here
License issues would prevent authentication, not just dACL application.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that a correctly configured authorization policy in ISE guarantees the dACL is sent; the trap is that the policy must be linked to an authorization profile that explicitly includes the dACL, and the RADIUS message must carry it—otherwise the switch never receives the filter.
Detailed technical explanation
How to think about this question
In Cisco ISE, dACLs are delivered via RADIUS Access-Accept using the Cisco-AV-Pair attribute (e.g., "ip:inacl#100=deny ip any any") or via downloadable ACLs (dACLs) using the Airespace-ACL-Name attribute. The switch must receive this attribute to install the ACL; if the attribute is missing due to misconfiguration (e.g., the authorization profile lacks the dACL assignment or the RADIUS server fails to include it), the switch applies no ACL, and the default behavior is to drop all traffic unless a permit-all rule exists. Real-world scenarios often involve administrators forgetting to attach the dACL to the authorization profile or using a wrong attribute name.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Secure Network Access, Visibility and Enforcement — This question tests Secure Network Access, Visibility and Enforcement — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The RADIUS server is not sending the dACL attribute in the Access-Accept — The most likely cause is that the RADIUS server (ISE) is not sending the dACL attribute in the Access-Accept packet. Even though the authorization policy applies a dACL, if the RADIUS message does not include the dACL name (e.g., Cisco-AV-Pair = "ip:inacl#100=...") or the switch does not receive it, the switch cannot enforce the filter, leaving the user authenticated but with no internet access due to default deny-all behavior.
What should I do if I get this 350-701 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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