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CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. 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 of the following are characteristics of DHCP snooping on a Cisco switch? (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
✓
It differentiates trusted and untrusted ports to filter DHCP messages.
DHCP snooping is a security feature that filters untrusted DHCP messages by differentiating trusted and untrusted ports. It builds and maintains a DHCP snooping binding database to track valid IP-to-MAC address assignments. Additionally, it prevents DHCP starvation attacks by rate-limiting DHCP messages on untrusted ports, typically using the 'ip dhcp snooping limit rate' command.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests that DHCP snooping's rate-limiting feature specifically targets DHCP starvation attacks, not rogue server attacks, and that the binding database is used for both IP source guard and dynamic ARP inspection integration.
Detailed technical explanation
How to think about this question
DHCP snooping operates by inspecting DHCP packets at the switch level; trusted ports (typically uplinks to DHCP servers) are allowed to send all DHCP message types, while untrusted ports (facing clients) are restricted to DHCPDISCOVER, DHCPREQUEST, and DHCPDECLINE only. The binding database, stored in the switch's CAM table, maps client MAC addresses to leased IP addresses, VLANs, and port information, and is used to validate subsequent DHCPACK messages and prevent rogue DHCP server attacks. Rate-limiting on untrusted ports is enforced in packets per second (pps), and exceeding the configured limit causes the switch to drop excess DHCP packets, mitigating starvation attacks.
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.
TExam Day Tips
- 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 200-301 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
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FAQ
Questions learners often ask
What does this 200-301 question test?
Network Services and Security — This question tests Network Services and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It differentiates trusted and untrusted ports to filter DHCP messages. — DHCP snooping is a security feature that filters untrusted DHCP messages by differentiating trusted and untrusted ports. It builds and maintains a DHCP snooping binding database to track valid IP-to-MAC address assignments. Additionally, it prevents DHCP starvation attacks by rate-limiting DHCP messages on untrusted ports, typically using the 'ip dhcp snooping limit rate' command.
What should I do if I get this 200-301 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This 200-301 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 200-301 exam.
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