Skip to content

Glossary: Network Security

ARP

Also written: Address Resolution Protocol

The protocol a device uses to find the MAC address for an IP address on its local network, by broadcasting a question such as "who has 192.168.20.12?". Broadcasts reach only ports in the same VLAN.

Where the book teaches it

Related terms

ARP poisoningDynamic ARP InspectionVLANMAC table