Question 973 of 2,152

IPv6 First Hop Security →mediumMultiple ChoiceObjective-mapped

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.

What is the default value of the Router Advertisement (RA) interval in IPv6 First Hop Security (FHS) when using the 'ipv6 nd ra-interval' command on an IOS-XE interface?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

A
100 seconds
Why wrong: This is not the default; 100 seconds is a common manual setting but not the IOS default.
B
200 seconds
Correct. The default RA interval on Cisco IOS-XE is 200 seconds.
C
600 seconds
Why wrong: 600 seconds is the default maximum RA interval per RFC 4861, but Cisco uses 200 seconds as the default for the 'ipv6 nd ra-interval' command.
D
300 seconds
Why wrong: 300 seconds is not the default; it is a common alternative but not the IOS default.

Full breakdown with real-world context →

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

✓

200 seconds

The default Router Advertisement (RA) interval in IPv6 First Hop Security (FHS) when using the 'ipv6 nd ra-interval' command on an IOS-XE interface is 200 seconds. This value is defined by RFC 4861, which specifies that the default RA interval should be between 30 and 1800 seconds, with Cisco implementing a default of 200 seconds for FHS to balance responsiveness and network overhead.

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.

✗
100 seconds
Why it's wrong here
This is not the default; 100 seconds is a common manual setting but not the IOS default.
✓
200 seconds
Why this is correct
Correct. The default RA interval on Cisco IOS-XE is 200 seconds.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
600 seconds
Why it's wrong here
600 seconds is the default maximum RA interval per RFC 4861, but Cisco uses 200 seconds as the default for the 'ipv6 nd ra-interval' command.
✗
300 seconds
Why it's wrong here
300 seconds is not the default; it is a common alternative but not the IOS default.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Cisco often tests the distinction between the default RA interval for standard IPv6 ND (600 seconds) and the default for FHS (200 seconds), trapping candidates who assume the standard value applies to FHS configurations.

Trap categories for this question

Command / output trap
600 seconds is the default maximum RA interval per RFC 4861, but Cisco uses 200 seconds as the default for the 'ipv6 nd ra-interval' command.

Detailed technical explanation

How to think about this question

The 'ipv6 nd ra-interval' command sets the time between unsolicited RAs, and in FHS, the default of 200 seconds is a compromise between minimizing network traffic and ensuring timely updates for security features like RA Guard and DHCPv6 Guard. Under the hood, FHS uses this interval to enforce first-hop security policies, and a shorter interval (e.g., 200 seconds) helps detect rogue RAs faster than the standard 600-second default. In real-world scenarios, adjusting this interval is critical in large enterprise networks where rapid detection of malicious RAs must be balanced against CPU and bandwidth usage.

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.

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.

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.

10 questions 20 questions 30 questions 50 questions Timed 30

300-410 practice-test guide →Study guide →Browse all practice tests

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: 200 seconds — The default Router Advertisement (RA) interval in IPv6 First Hop Security (FHS) when using the 'ipv6 nd ra-interval' command on an IOS-XE interface is 200 seconds. This value is defined by RFC 4861, which specifies that the default RA interval should be between 30 and 1800 seconds, with Cisco implementing a default of 200 seconds for FHS to balance responsiveness and network overhead.

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.

Are there clue words in this question I should notice?

Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

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 →

How Courseiva writes practice questions · Editorial policy

Keep practising

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.

Loading comments…

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.