In networks based on IPv4 the address resolution via ARP is unavoidable. But in practice, this doesn’t work because IPv4 addresses are too short to completely map the MAC address.
Theoretically, these hardware addresses would be suitable for global addressing. MAC addresses are assigned by their respective hardware manufacturers and are unique worldwide. These MAC addresses (Media Access Control) are unique 48-bit numbers, and make it possible to identify each device in the LAN via its network card.Įxample of a MAC address: 00-80-41-ae-fd-7e Instead, they use physical hardware addresses for addressing in local IPv4 networks. Unlike devices on the internet, devices in the LAN don’t communicate directly via IP addresses.
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