// Address Resolution Protocol — watch the broadcast, reply, and cache update
Step 0 / 4
LAN Segment — 192.168.1.0/24
ARP Cache — 192.168.1.10 (Sender)
IP Address
MAC Address
Type
TTL
192.168.1.1
00:11:22:33:44:55
dynamic
180s
What is ARP?
ARP bridges the gap between Layer 3 (IP addresses) and Layer 2 (MAC addresses). Before sending a frame, your device needs the MAC address of the destination. ARP finds it by broadcasting "Who has this IP?"