The answer is that clients will receive an infinite lease and never need to renew. The `ip dhcp lease infinite` command configures the DHCP server to assign a lease time that never expires, meaning the client does not have to send renewal requests at any point after obtaining the address. This effectively disables the standard DHCP lease lifecycle, where clients typically rebind at 50% and 87.5% of the lease duration. On the ENCOR 350-401 exam, this command tests your understanding of DHCP lease mechanics and the distinction between a finite lease and an infinite one; a common trap is assuming that “infinite” still requires periodic renewal or that it affects the DHCP pool’s subnet size. Remember the memory tip: “Infinite lease = no renewal clock,” so the client holds the IP indefinitely until the server or client explicitly releases it.
350-401 NAT and DHCP Practice Question
This 350-401 practice question tests your understanding of nat and dhcp. 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.
Examine this DHCP configuration:
```
service dhcp
ip dhcp pool POOL2
network 10.20.20.0 255.255.255.0
default-router 10.20.20.1
lease infinite
```
What is the effect of the 'lease infinite' command?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Clients will receive an infinite lease and never need to renew.
The lease infinite command sets the DHCP lease time to never expire.
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.
✓
Clients will receive an infinite lease and never need to renew.
Why this is correct
Correct. Infinite lease means the IP address is valid indefinitely.
Related concept
Read the scenario before looking for a memorised answer.
✗
The lease time is set to the default value of 1 day.
Why it's wrong here
Incorrect. The command explicitly sets infinite, not default.
✗
Clients will be unable to obtain an IP address because infinite is invalid.
Why it's wrong here
Incorrect. 'lease infinite' is a valid Cisco IOS command.
✗
The router will ignore the lease command and use the default.
Why it's wrong here
Incorrect. The command is accepted and applied.
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 command explicitly sets infinite, not default.
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 350-401 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 350-401 question in full detail.
Identify which 350-401 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.
NAT and DHCP — This question tests NAT and DHCP — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Clients will receive an infinite lease and never need to renew. — The lease infinite command sets the DHCP lease time to never expire.
What should I do if I get this 350-401 question wrong?
Identify which 350-401 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.
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Question Discussion
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