- A
The DHCPv6 pool has 5 active clients and provides prefix delegation, DNS, and domain name.
The output shows a prefix for delegation, DNS server, domain name, and 5 active clients.
- B
The DHCPv6 pool is used only for stateless address autoconfiguration (SLAAC).
Why wrong: The pool includes a prefix for delegation, which is used for stateful prefix delegation, not SLAAC.
- C
The DHCPv6 pool has 5 clients with addresses from the prefix 2001:DB8:1::/48.
Why wrong: The prefix is for delegation, not for address assignment; the clients may have delegated prefixes.
- D
The DHCPv6 pool has a preferred lifetime of 2592000 seconds.
Why wrong: The preferred lifetime is 604800 seconds; the valid lifetime is 2592000 seconds.
Question 352 of 2,152
DHCPv6 Pool Configuration: show ipv6 dhcp pool Output
This 300-410 practice question tests your understanding of dhcp (ipv4 and ipv6). 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 to verify DHCPv6 pool configuration on router R1:
R1# show ipv6 dhcp pool
Output: Pool DHCPv6_POOL : Prefix number: 1 Prefix: 2001:DB8:1::/48 Preferred lifetime 604800, valid lifetime 2592000 Expires at Mar 01 2025 12:00 PM (2592000 seconds) DNS server: 2001:DB8::1 Domain name: example.com Active clients: 5
What does this output indicate?
Quick Answer
The answer is that the DHCPv6 pool has 5 active clients and provides prefix delegation, DNS, and domain name. This is correct because the `show ipv6 dhcp pool` output directly lists the configured prefix `2001:DB8:1::/48` with its preferred and valid lifetimes, a DNS server, a domain name, and a count of five active clients, confirming the pool is actively delegating prefixes and offering additional network parameters. On the Cisco CCNP ENARSI 300-410 exam, this command tests your ability to interpret DHCPv6 pool configuration and distinguish between stateful DHCPv6 (which assigns addresses) and DHCPv6 prefix delegation (which delegates subnets to downstream routers). A common trap is confusing the "Active clients" count with the number of assigned addresses—here, it refers to devices that received a delegated prefix, not individual hosts. Remember the memory tip: "PAD" for Pool output—Prefix, Active clients, and DNS/Domain—to quickly verify delegation readiness.
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 DHCPv6 pool has 5 active clients and provides prefix delegation, DNS, and domain name.
The output shows a DHCPv6 pool configured with prefix delegation (2001:DB8:1::/48), DNS server, and domain name, along with 5 active clients. This confirms that the pool is used for stateful DHCPv6 (prefix delegation) and provides additional options, making option A correct.
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 DHCPv6 pool has 5 active clients and provides prefix delegation, DNS, and domain name.
Why this is correct
The output shows a prefix for delegation, DNS server, domain name, and 5 active clients.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The DHCPv6 pool is used only for stateless address autoconfiguration (SLAAC).
Why it's wrong here
The pool includes a prefix for delegation, which is used for stateful prefix delegation, not SLAAC.
- ✗
The DHCPv6 pool has 5 clients with addresses from the prefix 2001:DB8:1::/48.
Why it's wrong here
The prefix is for delegation, not for address assignment; the clients may have delegated prefixes.
- ✗
The DHCPv6 pool has a preferred lifetime of 2592000 seconds.
Why it's wrong here
The preferred lifetime is 604800 seconds; the valid lifetime is 2592000 seconds.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between DHCPv6 address assignment and prefix delegation, where candidates mistakenly interpret 'Active clients' as hosts with IPv6 addresses rather than routers that have received delegated prefixes.
Detailed technical explanation
How to think about this question
In DHCPv6 prefix delegation (RFC 3633), a delegating router (like R1) assigns prefixes to requesting routers (e.g., CPE devices) for downstream subnetting. The 'Active clients: 5' count refers to the number of requesting routers that have been delegated a prefix from this pool. The preferred and valid lifetimes are used for lease management, where the preferred lifetime (604800 seconds) is the time before the prefix becomes deprecated, and the valid lifetime (2592000 seconds) is the total 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
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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: The DHCPv6 pool has 5 active clients and provides prefix delegation, DNS, and domain name. — The output shows a DHCPv6 pool configured with prefix delegation (2001:DB8:1::/48), DNS server, and domain name, along with 5 active clients. This confirms that the pool is used for stateful DHCPv6 (prefix delegation) and provides additional options, making option A correct.
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.
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Last reviewed: Jul 4, 2026
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