- A
The DHCP server failed to create a binding for the client.
Why wrong: The output shows 'Adding binding' and 'Sending DHCPACK', indicating successful binding creation.
- B
The DHCP server successfully assigned an IP address to the client, and the client sent a DHCPINFORM to request additional parameters.
The sequence shows a successful DORA process (DISCOVER, OFFER, REQUEST, ACK) followed by an INFORM, which is used to get additional options like DNS servers.
- C
The DHCP client is using a relay agent because the DISCOVER was received on a different interface.
Why wrong: The DISCOVER was received on GigabitEthernet0/0, which is the same interface the OFFER and ACK are sent on; no relay is indicated.
- D
The DHCP server rejected the DHCPREQUEST because no binding was found.
Why wrong: The server created a new binding and sent an ACK; the 'No binding found' message is normal for a new client.
Quick Answer
The answer is that the DHCP server successfully assigned an IP address to the client, and the client subsequently sent a DHCPINFORM to request additional configuration parameters. This is correct because the debug output shows the complete four-message DORA handshake—DISCOVER, OFFER, REQUEST, and ACK—which confirms a successful address lease. The “No binding found” message is expected for a new client and is immediately followed by the binding creation, so it is not an error. The DHCPINFORM that follows is a separate, normal step where the client, already having an IP, asks for extra settings like DNS or domain name without renewing the lease. On the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to distinguish between a normal DHCP transaction and a failure; a common trap is misinterpreting the “No binding found” line as a problem. Remember the mnemonic “DORA plus INFO” to recall that a healthy DHCPv4 flow ends with an optional INFORM after the ACK.
300-410 DHCP (IPv4 and IPv6) Practice Question
This 300-410 practice question tests your understanding of dhcp (ipv4 and ipv6). The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A network engineer runs the following debug command to troubleshoot a DHCPv4 issue on router R1:
R1# debug ip dhcp server events
Output: DHCPD: DHCPDISCOVER received from 0050.7966.6800 on interface GigabitEthernet0/0 DHCPD: Sending DHCPOFFER to 0050.7966.6800 via GigabitEthernet0/0 DHCPD: DHCPREQUEST received from 0050.7966.6800 DHCPD: No binding found for client 0050.7966.6800 DHCPD: Adding binding for client 0050.7966.6800 DHCPD: Sending DHCPACK to 0050.7966.6800 via GigabitEthernet0/0 DHCPD: DHCPINFORM received from 0050.7966.6800 DHCPD: Sending DHCPACK to 0050.7966.6800 via GigabitEthernet0/0
What does this output indicate?
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
The DHCP server successfully assigned an IP address to the client, and the client sent a DHCPINFORM to request additional parameters.
The debug output shows the DHCP server successfully processing a DISCOVER, OFFER, REQUEST, and ACK sequence, followed by an INFORM message. The 'No binding found' message is normal for a new client, and the binding is created. The INFORM is used by the client to obtain additional configuration parameters after the address is assigned.
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.
- ✗
The DHCP server failed to create a binding for the client.
Why it's wrong here
The output shows 'Adding binding' and 'Sending DHCPACK', indicating successful binding creation.
- ✓
The DHCP server successfully assigned an IP address to the client, and the client sent a DHCPINFORM to request additional parameters.
Why this is correct
The sequence shows a successful DORA process (DISCOVER, OFFER, REQUEST, ACK) followed by an INFORM, which is used to get additional options like DNS servers.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The DHCP client is using a relay agent because the DISCOVER was received on a different interface.
Why it's wrong here
The DISCOVER was received on GigabitEthernet0/0, which is the same interface the OFFER and ACK are sent on; no relay is indicated.
- ✗
The DHCP server rejected the DHCPREQUEST because no binding was found.
Why it's wrong here
The server created a new binding and sent an ACK; the 'No binding found' message is normal for a new client.
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
The output shows 'Adding binding' and 'Sending DHCPACK', indicating successful binding creation.
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 300-410 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 300-410 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.
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FAQ
Questions learners often ask
What does this 300-410 question test?
DHCP (IPv4 and IPv6) — This question tests DHCP (IPv4 and IPv6) — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The DHCP server successfully assigned an IP address to the client, and the client sent a DHCPINFORM to request additional parameters. — The debug output shows the DHCP server successfully processing a DISCOVER, OFFER, REQUEST, and ACK sequence, followed by an INFORM message. The 'No binding found' message is normal for a new client, and the binding is created. The INFORM is used by the client to obtain additional configuration parameters after the address is assigned.
What should I do if I get this 300-410 question wrong?
Identify which 300-410 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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Last reviewed: Jun 19, 2026
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