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mediumDrag & DropObjective-mapped
350-401 Practice Question: Drag and drop the steps of Dynamic ARP Inspection…
Drag and drop the steps of Dynamic ARP Inspection (DAI) packet validation into the correct order, from first to last.
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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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Switch intercepts ARP request/reply on untrusted port
DAI first intercepts ARP packets on untrusted ports, then checks the sender MAC and IP against the DHCP snooping binding, validates ARP cache consistency, drops packets that mismatch, and finally forwards valid packets to the destination.
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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 |
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IP Services: DHCP, NAT, and DNS
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.
Key term
DHCP snooping
DHCP snooping is a network security feature that filters untrusted DHCP messages to prevent rogue DHCP servers from giving out false IP addresses.
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Variation 1. Drag and drop the steps of Dynamic ARP Inspection (DAI) packet validation into the correct order, from first to last.
medium- ✓ A.Enable DAI on specific VLANs
- ✓ B.Configure DHCP snooping binding table as validation source
- ✓ C.Switch receives ARP packet on untrusted port
- ✓ D.Compare sender MAC and IP against binding table
- ✓ E.Forward valid ARP or drop invalid packet
Why A: DAI validates ARP packets by first enabling it on VLANs, then using the DHCP snooping binding table as a source of truth. It checks the sender MAC and IP against the binding table and validates the packet format before forwarding or dropping.
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.