5.0 Security Fundamentals

Dynamic ARP Inspection Practice Questions

Preventing ARP spoofing using the DHCP snooping binding table.

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In a DHCP-based access VLAN, what is the primary purpose of Dynamic ARP Inspection (DAI) on untrusted switch ports?

To validate ARP packets against the DHCP snooping binding table and drop ones with mismatched IP-to-MAC mappings

DAI intercepts ARP on untrusted ports and, in this DHCP-based design, validates claimed bindings against the DHCP snooping database. Invalid ARP packets are dropped. Static hosts can require ARP ACLs or other platform-supported binding configuration.

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