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Question 803 of 1,420
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
✓
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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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 |
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Same concept, more angles
1 more way this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
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.
Last reviewed: Jun 18, 2026
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