📍

ARP — Address Resolution

Beginner

Free preview · 2 of 5 steps

ARP: the glue between IP and Ethernet

Ethernet frames use MAC addresses for delivery on the local network. IP packets use IP addresses for routing. ARP (Address Resolution Protocol) translates between them.

When your PC wants to send to 192.168.1.1, it first checks its ARP cache. If there's no entry, it broadcasts: "Who has 192.168.1.1? Tell 192.168.1.10."

Packets in motion — click to inspect:

1 / 2

Space to play/pause · ← → to step