The following include the OUIs of some well-known firms:ĭell: 00-14-22, Cisco: 00-40-96, and Nortel: 00-04-DC. This will be helpful in recognizing the manufacturer. This is called the Organizationally Unique Identifier (OUI).
Most manufacturers, like Dell and Cisco, use a unique identifier in the MAC address. A MAC address contains six sets having two characters each set is separated by a colon. An example of a MAC address is 00:1C:45:11:3A:B7. The identifier will be unique for each device. The computer is allowed to connect to the network using the network interface controller, which is a computer circuit card.
A MAC address is stored in hardware and is normally assigned by the manufacturer of a network interface controller.
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