Address Resolution Protocol (ARP)

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Address Resolution Protocol is a network layer protocol used to convert an IP address into a physical address, such as an Ethernet address. A host wishing to obtain a physical address broadcasts an ARP request onto the TCP/IP network. The host on the network that has the IP address in the request then replies with its physical hardware address.

Basics[edit]

When you try to ping an IP address on your local network, say 192.168.1.1, your system has to turn the IP address 192.168.1.1 into a MAC address. This involves using ARP to resolve the address.

ARP Table[edit]

Command in Linux and macOSĀ : arp -an 


Related commands[edit]

See also[edit]

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