The answer is that DHCP clients will receive a lease for 12 hours. This is correct because the `lease 0 12` command in the DHCP pool configuration explicitly sets the lease duration to 0 days and 12 hours, overriding any default lease time. The `ip dhcp excluded-address 10.10.10.1 10.10.10.10` command reserves the first ten addresses for static assignment, but it does not affect the lease duration offered to clients from the remaining pool. On the ENCOR 350-401 exam, this question tests your ability to read a DHCP pool configuration and distinguish between the lease timer and excluded address ranges—a common trap is confusing the excluded range with the lease time or assuming the default-router address is automatically excluded. Remember that the lease value is always read as days, hours, and minutes; here, `0 12` means twelve hours, not twelve days. A quick memory tip: “Lease is time, exclude is space”—the lease controls how long a client keeps an IP, while excluded addresses simply remove those IPs from the pool.
CCNP 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:
```
ip dhcp pool POOL1
network 10.10.10.0 255.255.255.0
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DHCP clients will receive a lease for 12 hours.
The configuration defines a DHCP pool with a lease of 12 hours (0 days, 12 hours) and excludes the first 10 addresses.
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.
✓
DHCP clients will receive a lease for 12 hours.
Why this is correct
Correct. The lease command specifies 0 days, 12 hours.
Related concept
Read the scenario before looking for a memorised answer.
✗
The router will assign IP addresses from 10.10.10.1 to 10.10.10.254.
Why it's wrong here
Incorrect. The excluded-address range prevents assignment of 10.10.10.1 through 10.10.10.10.
✗
The default lease is used because the lease command is incomplete.
Why it's wrong here
Incorrect. The lease command is valid and specifies 12 hours.
✗
The DNS server is set to 8.8.8.8, but clients will ignore it.
Why it's wrong here
Incorrect. The DNS server option is provided to clients via DHCP.
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 lease command is valid and specifies 12 hours.
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.
What to study next
Got this wrong? Here's your next step.
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: DHCP clients will receive a lease for 12 hours. — The configuration defines a DHCP pool with a lease of 12 hours (0 days, 12 hours) and excludes the first 10 addresses.
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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