mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Which configuration is missing to properly…
Which configuration is missing to properly implement IPv6 First Hop Security on an access switch port that should only allow traffic from a single host with a static IPv6 address 2001:db8:1::10?
⚠ Common exam trap
Cisco often tests the misconception that a single FHS feature (like RA guard, DHCP guard, or ND inspection) is sufficient for source address filtering, when in fact 'ipv6 verify source' combined with a static binding is required to restrict traffic to a specific static IPv6 address.
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 interface needs 'ipv6 verify source' and a static binding entry 'ipv6 source binding 2001:db8:1::10 interface GigabitEthernet0/6'.
IPv6 First Hop Security (FHS) on an access switch port requires both the 'ipv6 verify source' command on the interface and a static IPv6 source binding entry to enforce that only traffic from the specified host (2001:db8:1::10) is allowed. The 'ipv6 verify source' command enables source address validation using the binding table, and the static binding entry populates that table with the allowed source address and interface. Without both components, the switch cannot filter traffic based on the static IPv6 address.
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 interface needs 'ipv6 verify source' and a static binding entry 'ipv6 source binding 2001:db8:1::10 interface GigabitEthernet0/6'.
Why this is correct
IPv6 Source Guard with a static binding ensures only that source address is allowed.
- ✗
The interface needs 'ipv6 nd raguard' to block RAs.
Why it's wrong here
RA guard blocks RAs, not all traffic from other hosts.
- ✗
The interface needs 'ipv6 dhcp guard' to block DHCP messages.
Why it's wrong here
DHCP guard only filters DHCP, not all IPv6 traffic.
- ✗
The interface needs 'ipv6 nd inspection' to validate ND messages.
Why it's wrong here
ND inspection validates ND, but does not restrict all traffic to a single host.
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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.