These IDs are regulated by an Internet standards organization. The first half (24 bits) of the MAC address contains the ID number of the adapter manufacturer. MAC addresses are often considered permanent, but in some conditions, they can be changed.Ī 48-bit MAC address is represented as a string of six octets, "MM:MM:MM:SS:SS:SS". Sometimes, colons (:) are used instead of dashes (-). MAC addresses are expressed in hexadecimal notation. MAC addresses uniquely identify the adapter on the LAN. MAC addresses are linked to the hardware of the network adapters, hence they are also known as the "hardware address" or "physical address." Media Access Control (MAC) address is a physical address that works at the data link layer of the OSI model.Ī MAC address is a 48 or 64-bit address associated with a network adapter. MAC address is provided by the chip maker while IP Address is provided by the Internet Service Provider. Both MAC Address and IP Address are used to uniquely identify a machine on the internet.
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