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WWW, Internet (Chapter-6) M1-R5.1/CCC
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MAC Address:-

          Mac stands for Media Access Control. It is a unique identifier assigned to a network interface card (NIC) by the manufacturer. It is used to connect to the Ethernet network, and it has its own unique MAC address. The MAC addresses are assigned permanently to adapters and cannot be changed as they are a unique identification of the hardware interface of network. They are the physical addresses. This address is sent to your local network, i.e., to your router or ISP, where it is used to route information to your computer and serves as identification print on your network.

          MAC address is a 48 bit hexadecimal address. The format of a MAC address is MM:MM:MM:SS:SS:SS, where MM:MM:MM: the first 3 byte include address of the manufacturer, and the second half is the serial number of NIC card. MAC address of each computer on a network is unique. MAC address is used at the data link layer of OSI/TCP/IP model.

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