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350-401 Practice Question: Which three statements about DHCP snooping are…
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 is configured on a per-VLAN basis.
DHCP snooping is a security feature that filters untrusted DHCP messages. It builds a DHCP snooping binding database from trusted sources. Option A is correct because DHCP snooping is typically enabled on VLANs, not globally on the switch. Option C is correct because the binding database contains the client MAC address, IP address, lease time, VLAN, and port. Option D is correct because ports connected to DHCP servers are configured as trusted to allow DHCP server messages. Option B is incorrect because DHCP snooping does not prevent all ARP spoofing; that is the role of Dynamic ARP Inspection (DAI). Option E is incorrect because DHCP snooping does not encrypt DHCP traffic; it only filters messages based on trust.
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 is configured on a per-VLAN basis.
Why this is correct
Correct because DHCP snooping is enabled on specific VLANs using the 'ip dhcp snooping vlan' command.
- ✗
DHCP snooping prevents all types of ARP spoofing attacks.
Why it's wrong here
Incorrect because DHCP snooping alone does not prevent ARP spoofing; Dynamic ARP Inspection (DAI) is required for that purpose.
- ✓
The DHCP snooping binding database includes the client MAC address, IP address, lease time, VLAN, and port.
Why this is correct
Correct because the binding database records these details for each DHCP lease obtained on a trusted port.
- ✓
Ports connected to DHCP servers should be configured as trusted ports.
Why this is correct
Correct because trusted ports are allowed to send DHCP server messages (OFFER, ACK) and are typically connected to legitimate DHCP servers.
- ✗
DHCP snooping encrypts all DHCP traffic between the client and server.
Why it's wrong here
Incorrect because DHCP snooping does not provide encryption; it only filters DHCP messages based on trust and builds a binding database.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
Related to this question
Learn chapter
VLANs and Spanning Tree Protocol Concepts
Key term
L2 Security Features
L2 Security Features are network security mechanisms that operate at Layer 2 of the OSI model to protect local network traffic from threats like MAC spoofing, ARP attacks, and unauthorized access.
Key term
Dynamic ARP Inspection
Dynamic ARP Inspection is a security feature that validates ARP packets on a network to prevent man-in-the-middle attacks by ensuring that only legitimate ARP messages are forwarded.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.