The figure below illustrates the Media Access Control address OUI as well as Interface controller-specific number. The figure below illustrates the Media Access Control Address.

Devices manufactured by the same vendor OUI, each is given their own unique 24-bit number. The rightmost digits of a Media Access Control address represent an identification number for the particular device. the manufacturer often possesses many OUI numbers associated with their different products. Every manufacturer registers and obtains MAC OUI as assigned by the IEEE. The leftmost 6 digits (24 bits) called an “OUI” which associated with the adapter manufacturer.

Hardware and software manufacturers represent the Physical address or Media Access Control address in different hexadecimal formats that are 12 digits (6 byte or 48 bits), as shown in the following: Media Access Control Addresses assigned to an Ethernet device must have a vendor OUI and a unique serial number assigned to them. So, each MAC Addresses assigned to an Ethernet device must have a vendor OUI and also a unique serial number assigned to them. IEEE required registration of any organization with them that manufactures Ethernet Devices and NIC cards.Īfter registration, IEEE assigns a 3-byte code term Organizational Unique Identifier( OUI). Vendor Develop Ethernet Card and also assign it a unique address followed by IEEE standards. Media Access Control addressing also provides a method for device identification. So, to stop too much overhead involved in the processing of every frame, MAC addresses identify the actual source and destination. Therefore all nodes would receive every frame transmitted over the shared media. In Ethernet LAN, each network device connected to share media. The base sixteen numbers system uses the number from 0 to 9 as well as letters from A to F. As we know that decimal is a base ten “(xxx)10” number system and Hexadecimal is a base sixteen “(xxx)16” number system. It is a 48-bit binary value expressed as 12 hexadecimal digits. Most IEEE 802 network technologies, including Ethernet, Wi-Fi, and also a Bluetooth uses Media Access Control address for within network segment communication. It is also known as “ hardware address” or “ physical address” and very important for communication within network segments. A media access control address or a MAC address of a device is a worldwide unique identifier assigned to a network interface controller.

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