mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to verify IPv6 traffic…
A network engineer runs the following command to verify IPv6 traffic filtering with logging:
R1# show logging | include FILTER *Mar 1 00:04:56.789: %IPV6_ACL-6-ACCESSLOGDP: list FILTER denied tcp 2001:DB8:2::1(12345) -> 2001:DB8:3::1(80), 1 packet
What does this output indicate?
⚠ Common exam trap
Cisco often tests the ability to distinguish between ACL deny/permit actions in log messages, where the trap is that candidates misread 'denied' as 'permitted' or confuse ACL logging with other features like uRPF or interface statistics.
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
✓
A TCP packet from 2001:DB8:2::1 to destination 2001:DB8:3::1 port 80 was denied by the access list.
The log message shows an IPv6 ACL (named FILTER) logging a denied TCP packet from source 2001:DB8:2::1 port 12345 to destination 2001:DB8:3::1 port 80. The keyword 'denied' in the log entry confirms the packet was blocked by the access list, making option A correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A TCP packet from 2001:DB8:2::1 to destination 2001:DB8:3::1 port 80 was denied by the access list.
Why this is correct
Correct. The log clearly indicates the denied packet details.
- ✗
A TCP packet was permitted by the access list.
Why it's wrong here
Incorrect. The log says 'denied'.
- ✗
The access list is not applied to any interface.
Why it's wrong here
Incorrect. The log shows it is active and filtering.
- ✗
The packet was dropped due to uRPF.
Why it's wrong here
Incorrect. The log references the access list, not uRPF.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.