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300-410 Practice Question: The default lease duration for a DHCPv4 address…
What is the default lease duration for a DHCPv4 address pool on a Cisco IOS router?
⚠ Common exam trap
Cisco often tests the default lease value as a memorization point, and the trap here is that candidates may confuse the Cisco default with the RFC 2131 suggested default of 1 day (which is the same) or assume a longer lease like 7 days is standard for enterprise networks.
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
✓
1 day
The default lease duration for a DHCPv4 address pool on a Cisco IOS router is 1 day (86400 seconds). This is defined by the Cisco IOS DHCP server implementation, which uses a 24-hour lease as the default when no lease duration is explicitly configured under the DHCP pool configuration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
1 day
Why this is correct
The default lease time is 1 day (24 hours) unless overridden with the lease command.
- ✗
7 days
Why it's wrong here
7 days is not the default; it can be configured but is not the default.
- ✗
30 minutes
Why it's wrong here
30 minutes is not the default; the default is much longer.
- ✗
Infinite
Why it's wrong here
Infinite lease is not the default; it must be explicitly configured.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.