qosausa.blogg.se - Get mac address from ip remotely linux

Because it is a broadcast packet, it is sent to a special MAC address that causes all machines on the network to receive it. If the IP address isn’t found in the ARP table, the system will then send a broadcast packet to the network using the ARP protocol to ask "who has 192.168.1.1".

If there is a value cached, ARP is not used. When trying to send a packet to an IP address, the system can first consult this table to see if it already knows the MAC address.

Systems keep an ARP look-up table wherever they store information about what IP addresses are associated with what MAC addresses.

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

ARP stands for Address Resolution Protocol.