- A
DHCP snooping builds a binding database by examining DHCPACK messages received on trusted ports.
Correct because the switch populates the DHCP snooping binding table using the client information from DHCPACK packets.
- B
Ports connected to DHCP servers should be configured as trusted ports to allow server messages.
Correct because trusted ports are allowed to send DHCPOFFER, DHCPACK, etc., without being dropped by snooping.
- C
The ip dhcp snooping limit rate command is used to restrict the number of DHCP packets per second on trusted ports.
Why wrong: Incorrect because rate limiting is applied on untrusted ports to mitigate DHCP starvation attacks, not on trusted ports.
- D
DHCP snooping can insert Option 82 information into DHCP requests received on untrusted ports.
Correct because the switch adds relay agent information (Option 82) to DHCP packets from untrusted ports before forwarding.
- E
DHCP snooping prevents rogue DHCP server attacks by blocking all DHCP server messages on trusted ports.
Why wrong: Incorrect because DHCP snooping blocks server messages on untrusted ports, not on trusted ports; trusted ports are allowed to send server messages.
CCNP NAT and DHCP Practice Question
This 350-401 practice question tests your understanding of nat and dhcp. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which three statements about DHCP snooping are true? (Choose three.)
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
DHCP snooping builds a binding database by examining DHCPACK messages received on trusted ports.
DHCP snooping is a security feature that filters untrusted DHCP messages. It builds a binding database from DHCPACK messages. Trusted ports are typically uplinks to DHCP servers. The rate limit is applied on untrusted ports to prevent DHCP starvation. Option 82 (relay agent information) is inserted by the switch on untrusted ports. DHCP snooping does not prevent rogue DHCP servers on trusted ports, as those are allowed by default.
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 snooping builds a binding database by examining DHCPACK messages received on trusted ports.
Why this is correct
Correct because the switch populates the DHCP snooping binding table using the client information from DHCPACK packets.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Ports connected to DHCP servers should be configured as trusted ports to allow server messages.
Why this is correct
Correct because trusted ports are allowed to send DHCPOFFER, DHCPACK, etc., without being dropped by snooping.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The ip dhcp snooping limit rate command is used to restrict the number of DHCP packets per second on trusted ports.
Why it's wrong here
Incorrect because rate limiting is applied on untrusted ports to mitigate DHCP starvation attacks, not on trusted ports.
- ✓
DHCP snooping can insert Option 82 information into DHCP requests received on untrusted ports.
Why this is correct
Correct because the switch adds relay agent information (Option 82) to DHCP packets from untrusted ports before forwarding.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
DHCP snooping prevents rogue DHCP server attacks by blocking all DHCP server messages on trusted ports.
Why it's wrong here
Incorrect because DHCP snooping blocks server messages on untrusted ports, not on trusted ports; trusted ports are allowed to send server messages.
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.
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.
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NAT and DHCP — study guide chapter
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FAQ
Questions learners often ask
What does this 350-401 question test?
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 snooping builds a binding database by examining DHCPACK messages received on trusted ports. — DHCP snooping is a security feature that filters untrusted DHCP messages. It builds a binding database from DHCPACK messages. Trusted ports are typically uplinks to DHCP servers. The rate limit is applied on untrusted ports to prevent DHCP starvation. Option 82 (relay agent information) is inserted by the switch on untrusted ports. DHCP snooping does not prevent rogue DHCP servers on trusted ports, as those are allowed by default.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 18, 2026
This 350-401 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 350-401 exam.
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