Ethernet, ARP, and RARP

Ethernet operates at Layer 2 carrying frames. ARP resolves IPv4 addresses to MAC addresses. RARP is obsolete.

Inspect ARP neighbor table

Input:

ip neigh

Output:

192.168.1.1 dev eth0 lladdr 00:11:22:33:44:55 REACHABLE

Shows L2 address resolution for IPv4 peers.

References:

• https://man7.org/linux/man-pages/man8/ip-neighbour.8.html

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