![]() MAC addresses are used by the Media Access Control (data link layer of the OSI model) protocol for Ethernet networks. IP addresses can be either be static (fixed) or dynamic (assigned by a DHCP server). MAC addresses are hard-coded into a network adapter. IP addresses are used by the Transmission Control Protocol/Internet Protocol (TCP/IP) for devices to communicate with each other via the internet. MAC addresses are used by the Media Access Control protocol, which dictates how data is sent over Ethernet networks. What are the differences between MAC address and IP address? MAC AddressĪ MAC address is a unique identifier assigned to every network card.Īn IP address is a unique identifier assigned to each device that connects to the internet. No two devices will have the same MAC address. They are assigned by the manufacturer and are specific to each piece of equipment. The last three pairs (20-4A-E4) are known as an individual identifiers. This ensures that every MAC address is unique. The OUIs are assigned by an organization called the Institute of Electrical and Electronics Engineers (IEEE), and no two manufacturers can have the same OUI. They identify the manufacturer of the equipment. The first three pairs (00-0C-29) are known as the Organizationally Unique Identifier (OUI). (Hexadecimal number system uses 16 symbols instead of 10 like the conventional number system.) For example, a MAC address might look something like this: 00-0C-29-20-4A-E4. The MAC address comprises six pairs of hexadecimal digits. By looking at the MAC address, you can quickly identify which hardware device is sending or receiving data.
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