easyMultiple Choice
300-410 Practice Question: Which DHCPv6 message is used by a server to…
Which DHCPv6 message is used by a server to respond to a SOLICIT with available configuration parameters?
⚠ Common exam trap
Cisco often tests the distinction between DHCPv6 message types, and the trap here is confusing ADVERTISE with REPLY, as candidates may incorrectly assume the server directly sends configuration parameters (REPLY) in response to a SOLICIT, overlooking the two-step discovery process.
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
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ADVERTISE
In DHCPv6, when a client sends a SOLICIT message to discover available DHCPv6 servers, each server that can provide configuration parameters responds with an ADVERTISE message. This ADVERTISE message contains the server's preference and available configuration options, allowing the client to select the appropriate server. This process is defined in RFC 8415 and mirrors the DHCPv4 OFFER step.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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REPLY
Why it's wrong here
REPLY answers a REQUEST, CONFIRM, RENEW, REBIND or INFORMATION-REQUEST, not a SOLICIT; the server's response to SOLICIT is ADVERTISE, offering available configuration. REPLY is tempting because it is the server's general reply message, and it would be correct after a client sends REQUEST following the ADVERTISE.
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ADVERTISE
Why this is correct
ADVERTISE is the server's reply to a client's SOLICIT, carrying available configuration parameters such as DNS servers and prefixes. It satisfies the stem's requirement for the server response message, preceding REQUEST, REPLY and any CONFIRM exchange in the DHCPv6 four-message sequence.
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RECONFIGURE
Why it's wrong here
RECONFIGURE is sent by a server to instruct clients to re-run configuration, typically triggering Renew or Information-request; it does not answer a SOLICIT. It is tempting as a server-initiated control message, and would be correct when the server needs clients to refresh parameters after a configuration change.
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INFORMATION-REQUEST
Why it's wrong here
INFORMATION-REQUEST is sent by a client to obtain configuration parameters without address assignment; it is not the server's answer to SOLICIT. The server replies to SOLICIT with ADVERTISE. INFORMATION-REQUEST is tempting because it also carries configuration data, and is correct for stateless DHCPv6 clients that already have addresses.
Visual reference
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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.