- A
The client has been assigned an IPv6 address via DHCPv6.
The binding shows an IA NA with an assigned address.
- B
The client is using SLAAC instead of DHCPv6.
Why wrong: The binding indicates DHCPv6 was used.
- C
The client's lease has expired.
Why wrong: The valid lifetime is 2592000 seconds, so it is still valid.
- D
The client is not authorized.
Why wrong: The username is unknown, but the binding is still active.
Question 2,108 of 2,152
300-410 IPv6 First Hop Security Practice Question
This 300-410 practice question tests your understanding of ipv6 first hop security. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 network engineer runs the following command on Router R1:
R1# show ipv6 dhcp binding
Client: FE80::1 DUID: 0003000100AABBCCDDEE
Username: unknown
IA NA: IA ID 0x00010001, T1 302400, T2 483840 Address: 2001:DB8:1::100/128 Preferred lifetime 604800, valid lifetime 2592000 Expires at Sep 15 2024 12:00 PM (2592000 seconds)
Based on this output, which statement is correct?
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 client has been assigned an IPv6 address via DHCPv6.
The output shows a DHCPv6 binding entry with an IA NA (Identity Association for Non-temporary Addresses) containing an assigned IPv6 address (2001:DB8:1::100/128) along with preferred and valid lifetimes. This confirms that the client with DUID 0003000100AABBCCDDEE successfully obtained an IPv6 address via stateful DHCPv6, not through SLAAC or any other method.
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 client has been assigned an IPv6 address via DHCPv6.
Why this is correct
The binding shows an IA NA with an assigned address.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The client is using SLAAC instead of DHCPv6.
Why it's wrong here
The binding indicates DHCPv6 was used.
- ✗
The client's lease has expired.
Why it's wrong here
The valid lifetime is 2592000 seconds, so it is still valid.
- ✗
The client is not authorized.
Why it's wrong here
The username is unknown, but the binding is still active.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between stateful DHCPv6 and SLAAC by showing a DHCPv6 binding output, leading candidates to mistakenly think SLAAC is in use when the presence of an IA NA and assigned address clearly indicates DHCPv6.
Detailed technical explanation
How to think about this question
The 'show ipv6 dhcp binding' command displays the DHCPv6 server's lease database, which is populated only when a client completes the four-message exchange (Solicit, Advertise, Request, Reply) as defined in RFC 3315. The IA ID 0x00010001 and T1/T2 timers (302400 and 483840 seconds) are used for lease renewal and rebinding, and the preferred lifetime (604800 seconds) indicates how long the address can be used before it becomes deprecated, while the valid lifetime (2592000 seconds) is the maximum lease duration.
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 practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Visual reference
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.
- →
IPv6 First Hop Security — study guide chapter
Learn the concepts, then practise the questions
- →
IPv6 First Hop Security practice questions
Targeted practice on this topic area only
- →
All 300-410 questions
2,152 questions across all exam domains
- →
Cisco CCNP ENARSI 300-410 study guide
Full concept coverage aligned to exam objectives
- →
300-410 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 300-410 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Layer 3 Technologies practice questions
Practise 300-410 questions linked to Layer 3 Technologies.
EIGRP Troubleshooting practice questions
Practise 300-410 questions linked to EIGRP Troubleshooting.
OSPF Troubleshooting (v2/v3) practice questions
Practise 300-410 questions linked to OSPF Troubleshooting (v2/v3).
BGP Troubleshooting practice questions
Practise 300-410 questions linked to BGP Troubleshooting.
Route Redistribution practice questions
Practise 300-410 questions linked to Route Redistribution.
Policy-Based Routing (PBR) practice questions
Practise 300-410 questions linked to Policy-Based Routing (PBR).
VRF-Lite practice questions
Practise 300-410 questions linked to VRF-Lite.
Route Maps and Route Filtering practice questions
Practise 300-410 questions linked to Route Maps and Route Filtering.
Administrative Distance practice questions
Practise 300-410 questions linked to Administrative Distance.
Route Summarization practice questions
Practise 300-410 questions linked to Route Summarization.
Bidirectional Forwarding Detection (BFD) practice questions
Practise 300-410 questions linked to Bidirectional Forwarding Detection (BFD).
VPN Technologies practice questions
Practise 300-410 questions linked to VPN Technologies.
Practice this exam
Start a free 300-410 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 300-410 question test?
IPv6 First Hop Security — This question tests IPv6 First Hop Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The client has been assigned an IPv6 address via DHCPv6. — The output shows a DHCPv6 binding entry with an IA NA (Identity Association for Non-temporary Addresses) containing an assigned IPv6 address (2001:DB8:1::100/128) along with preferred and valid lifetimes. This confirms that the client with DUID 0003000100AABBCCDDEE successfully obtained an IPv6 address via stateful DHCPv6, not through SLAAC or any other method.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 300-410 practice questions
- Drag and drop the steps to negotiate an IKEv2 IPsec site-to-site tunnel into the correct order, from first to last.
- Drag and drop the steps to troubleshoot an IPsec site-to-site VPN adjacency failure into the correct order, from first t…
- Drag and drop the steps to verify and validate the operational state of an IPsec site-to-site VPN into the correct order…
- Consider the following configuration snippet: ip cef ! interface GigabitEthernet0/0 ip address 10.0.0.1 255.255.255.25…
- A router is configured with 'logging host 10.1.1.100' and 'logging trap informational'. The engineer notices that syslog…
- Drag and drop the steps to configure a GRE tunnel for IPv6 over IPv4 into the correct order, from first to last.
Last reviewed: Jul 4, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.