- A
It validates Neighbor Solicitation and Neighbor Advertisement messages against the IPv6 snooping binding table.
ND Inspection checks NS and NA messages against the binding table to prevent spoofing attacks.
- B
It can be configured to rate-limit ND packets on a per-interface basis.
Rate-limiting is a key feature of ND Inspection to prevent DoS attacks using excessive ND messages.
- C
It prevents rogue DHCPv6 servers from assigning malicious addresses.
Why wrong: This is the function of DHCPv6 Guard, not ND Inspection; ND Inspection focuses on ND messages, not DHCP.
- D
It uses a prefix list to determine which source addresses are allowed.
Why wrong: ND Inspection uses the binding table, not a prefix list; prefix lists are used in other features like RA Guard.
- E
It is enabled globally and cannot be applied on a per-interface basis.
Why wrong: ND Inspection is enabled per-interface using the 'ipv6 nd inspection' command, not just globally.
300-410 IPv6 First Hop Security Practice Question
This 300-410 practice question tests your understanding of ipv6 first hop security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO statements about IPv6 Neighbor Discovery (ND) Inspection are true? (Choose TWO.)
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
It validates Neighbor Solicitation and Neighbor Advertisement messages against the IPv6 snooping binding table.
ND Inspection is a security feature that validates ND messages against a binding table. It drops invalid messages and can rate-limit ND packets. The other statements are incorrect: ND Inspection does not protect against DHCPv6 attacks, and it does not use a prefix list by default.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It validates Neighbor Solicitation and Neighbor Advertisement messages against the IPv6 snooping binding table.
Why this is correct
ND Inspection checks NS and NA messages against the binding table to prevent spoofing attacks.
Related concept
OSPF neighbours must agree on key parameters.
- ✓
It can be configured to rate-limit ND packets on a per-interface basis.
Why this is correct
Rate-limiting is a key feature of ND Inspection to prevent DoS attacks using excessive ND messages.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
It prevents rogue DHCPv6 servers from assigning malicious addresses.
Why it's wrong here
This is the function of DHCPv6 Guard, not ND Inspection; ND Inspection focuses on ND messages, not DHCP.
- ✗
It uses a prefix list to determine which source addresses are allowed.
Why it's wrong here
ND Inspection uses the binding table, not a prefix list; prefix lists are used in other features like RA Guard.
- ✗
It is enabled globally and cannot be applied on a per-interface basis.
Why it's wrong here
ND Inspection is enabled per-interface using the 'ipv6 nd inspection' command, not just globally.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
ND Inspection is enabled per-interface using the 'ipv6 nd inspection' command, not just globally.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 300-410 question test?
IPv6 First Hop Security — This question tests IPv6 First Hop Security — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: It validates Neighbor Solicitation and Neighbor Advertisement messages against the IPv6 snooping binding table. — ND Inspection is a security feature that validates ND messages against a binding table. It drops invalid messages and can rate-limit ND packets. The other statements are incorrect: ND Inspection does not protect against DHCPv6 attacks, and it does not use a prefix list by default.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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.
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