The sender needs to transmit an ARP broadcast which all hosts in the LAN will receive. In most cases, the sender doesn’t know what the destination MAC address is. For the sender to know which computer to forward this packet to, it needs to have the destination IP and the destination MAC address.
When a computer wants to communicate with another computer in the network, it packages the request into an IP datagram or IP packet. Let us understand local and global IP to find the MAC address place when accessing the internet.Īlso Read: 3 Ways to Find Out Your IP Address in LinuxĪ local IP address is assigned to you by the mediator (routers, switches, etc.) for local communication between devices without any connection to the outside world.For example, when a computer joins a network it has a unique IP address so that it can communicate with other hosts in the network. You know, the MAC address is the unique physical/hardware address assigned during manufacturing. The relationship between a MAC address and an IP address is essential, and both combinations are the way to access the global internet.
Relationship Between MAC Address & IP Address Surprisingly, this OUI is registered and assigned to the manufacturer by the IEEE, the same organization responsible for assigning IPv4/IPv6 addresses. The 00:14:22 identifies the manufacturer as Dell, and the other three sets are used to determine the device.Ĭlick here to find your MAC address manufacturer For example, my system MAC address is 00:14:22:14:db:db where the first three sets of this address are 00:14:22 considered OUI.
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