- A
3600 seconds (1 hour)
Why wrong: This is not the default; the default is 86400 seconds.
- B
43200 seconds (12 hours)
Why wrong: This is a common configured value but not the IOS default.
- C
86400 seconds (1 day)
The default lease time for Cisco IOS-XE DHCP server is 86400 seconds.
- D
604800 seconds (7 days)
Why wrong: This is too long; the default is 86400 seconds.
Question 646 of 2,152
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.
What is the default DHCPv4 server lease time on a Cisco IOS-XE router configured as a DHCP server?
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
✓
86400 seconds (1 day)
The default DHCPv4 lease time on a Cisco IOS-XE router configured as a DHCP server is 86400 seconds (1 day). This is defined in the Cisco IOS DHCP server configuration and is the standard default value used when no lease duration is explicitly specified in the DHCP pool configuration.
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.
- ✗
3600 seconds (1 hour)
Why it's wrong here
This is not the default; the default is 86400 seconds.
- ✗
43200 seconds (12 hours)
Why it's wrong here
This is a common configured value but not the IOS default.
- ✓
86400 seconds (1 day)
Why this is correct
The default lease time for Cisco IOS-XE DHCP server is 86400 seconds.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
604800 seconds (7 days)
Why it's wrong here
This is too long; the default is 86400 seconds.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the default lease time to catch candidates who confuse common enterprise practices (like 12 hours or 7 days) with the actual IOS default of 1 day.
Detailed technical explanation
How to think about this question
The DHCP lease time is defined in RFC 2131, and Cisco IOS-XE defaults to 86400 seconds (1 day) when no lease command is configured under the DHCP pool. This value balances network stability with address reclamation, and can be overridden with the 'lease' command in DHCP pool configuration mode. In real-world scenarios, an administrator might adjust this for specific subnets to reduce DHCP traffic or to free addresses faster in dynamic environments.
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: 86400 seconds (1 day) — The default DHCPv4 lease time on a Cisco IOS-XE router configured as a DHCP server is 86400 seconds (1 day). This is defined in the Cisco IOS DHCP server configuration and is the standard default value used when no lease duration is explicitly specified in the DHCP pool configuration.
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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