![]() ![]() ![]() If the I/G bit is zero (0), we have a unicast address, and the frame has a single destination. The very first bit, called bit zero or I/G bit, determines if an address is unicast or multicast.Ĭomputers define this bit when sending a frame through the network. In the first byte of the first part of a MAC address, we have two special bits: the first and the second. ![]() Each digit, in turn, can have values from zero (0) to nine (9) and from A (10) to F (15).įurthermore, there exist two major parts in MAC addresses: the manufacturer identification (first three bytes) and a unique number defined by the manufacturer that identifies a particular device in a network (last three bytes). So, for each byte, we’ll have a two-digit number. MAC addresses are formed by six bytes containing hexadecimal numbers. ![]()
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