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300-410 Practice Question: Which DHCP message type is used by a client to…
Which DHCP message type is used by a client to renew its lease before it expires?
⚠ Common exam trap
Cisco often tests the distinction between the unicast DHCPREQUEST used for lease renewal and the broadcast DHCPREQUEST used during the initial DORA process, leading candidates to mistakenly think DHCPDISCOVER is involved in renewal.
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
✓
DHCPREQUEST
When a DHCP client wants to renew its existing lease before it expires, it sends a unicast DHCPREQUEST message directly to the DHCP server that originally granted the lease. This is part of the renewal process defined in RFC 2131, where the client transitions from the BOUND state to the RENEWING state and uses the server's IP address to request an extension of the lease time.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DHCPREQUEST
Why this is correct
The client uses DHCPREQUEST to renew its lease, sent unicast to the DHCP server.
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DHCPDISCOVER
Why it's wrong here
DHCPDISCOVER is used to find a DHCP server during initial lease acquisition.
- ✗
DHCPACK
Why it's wrong here
DHCPACK is sent by the server to acknowledge a lease, not by the client.
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DHCPRELEASE
Why it's wrong here
DHCPRELEASE is used by the client to release its lease, not to renew it.
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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.