The Individual/Group (I/G) bit is used to indicate whether the destination address is a unicast (individual) or multicast (group) address. For a unicast address, the I/G bit is set to 0. For a multicast address, the I/G bit is set to 1. The broadcast address is a special case of multicast, and its I/G bit is set to 1. The I/G bit is also known as the multicast bit.
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