- A
SLAAC requires the 'A' flag to be set in Router Advertisements.
Correct. The 'A' (autonomous) flag in the RA prefix information option indicates that hosts can use SLAAC to generate addresses from that prefix.
- B
When using SLAAC, DHCPv6 can still be used to provide DNS server information.
Correct. Stateless DHCPv6 (with the 'O' flag set) allows hosts to obtain DNS and other parameters from a DHCPv6 server without receiving an address.
- C
The 'M' flag in Router Advertisements must be set for SLAAC to operate.
Why wrong: Incorrect. The 'M' (managed) flag indicates that hosts should use stateful DHCPv6 for addresses; SLAAC does not require it.
- D
The command 'ipv6 nd other-config-flag' sets the 'M' flag in Router Advertisements.
Why wrong: Incorrect. The 'ipv6 nd other-config-flag' command sets the 'O' (other configuration) flag, not the 'M' flag.
- E
SLAAC can only be used on Ethernet interfaces.
Why wrong: Incorrect. SLAAC can be used on any interface that supports IPv6, including serial, tunnel, and wireless interfaces.
Quick Answer
The answer is that DHCPv6 can still be used to provide DNS server information when using SLAAC. This is correct because SLAAC allows hosts to generate their own IPv6 addresses using the prefix from Router Advertisements (RAs) and a modified EUI-64 or privacy extension, but it does not provide DNS server details; stateless DHCPv6 fills that gap by offering other configuration parameters without assigning addresses. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of the interaction between the 'A', 'M', and 'O' flags in RAs—specifically, the 'O' flag (set with `ipv6 nd other-config-flag`) signals hosts to use DHCPv6 for DNS and other options, while the 'M' flag indicates stateful DHCPv6 for addresses. A common trap is confusing the 'O' flag with the 'M' flag, or assuming SLAAC precludes any DHCPv6 use. Remember the mnemonic: "A for Auto-address, O for Other-info, M for Managed-address."
300-410 DHCP (IPv4 and IPv6) Practice Question
This 300-410 practice question tests your understanding of dhcp (ipv4 and ipv6). This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 DHCPv6 stateless autoconfiguration (SLAAC) 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
SLAAC requires the 'A' flag to be set in Router Advertisements.
SLAAC allows hosts to generate their own IPv6 addresses using the prefix from Router Advertisements (RAs) and a modified EUI-64 or privacy extension. DHCPv6 can be used in stateless mode to provide additional information like DNS servers, but not addresses. The 'O' flag in RAs indicates that hosts should use DHCPv6 for other configuration parameters, while the 'M' flag indicates managed (stateful) DHCPv6. The 'A' flag indicates that SLAAC is available. The 'ipv6 nd other-config-flag' command sets the 'O' flag, not the 'M' flag.
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.
- ✓
SLAAC requires the 'A' flag to be set in Router Advertisements.
Why this is correct
Correct. The 'A' (autonomous) flag in the RA prefix information option indicates that hosts can use SLAAC to generate addresses from that prefix.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
When using SLAAC, DHCPv6 can still be used to provide DNS server information.
Why this is correct
Correct. Stateless DHCPv6 (with the 'O' flag set) allows hosts to obtain DNS and other parameters from a DHCPv6 server without receiving an address.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The 'M' flag in Router Advertisements must be set for SLAAC to operate.
Why it's wrong here
Incorrect. The 'M' (managed) flag indicates that hosts should use stateful DHCPv6 for addresses; SLAAC does not require it.
- ✗
The command 'ipv6 nd other-config-flag' sets the 'M' flag in Router Advertisements.
Why it's wrong here
Incorrect. The 'ipv6 nd other-config-flag' command sets the 'O' (other configuration) flag, not the 'M' flag.
- ✗
SLAAC can only be used on Ethernet interfaces.
Why it's wrong here
Incorrect. SLAAC can be used on any interface that supports IPv6, including serial, tunnel, and wireless interfaces.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Incorrect. The 'ipv6 nd other-config-flag' command sets the 'O' (other configuration) flag, not the 'M' flag.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this 300-410 question test?
DHCP (IPv4 and IPv6) — This question tests DHCP (IPv4 and IPv6) — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: SLAAC requires the 'A' flag to be set in Router Advertisements. — SLAAC allows hosts to generate their own IPv6 addresses using the prefix from Router Advertisements (RAs) and a modified EUI-64 or privacy extension. DHCPv6 can be used in stateless mode to provide additional information like DNS servers, but not addresses. The 'O' flag in RAs indicates that hosts should use DHCPv6 for other configuration parameters, while the 'M' flag indicates managed (stateful) DHCPv6. The 'A' flag indicates that SLAAC is available. The 'ipv6 nd other-config-flag' command sets the 'O' flag, not the 'M' flag.
What should I do if I get this 300-410 question wrong?
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 19, 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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