Summary Points
Every network interface card (NIC) is assigned a unique 6-byte MAC address.
Universally unique media access control (MAC) addresses are controlled by the IEEE, which assigns 3-byte organizationally unique identifiers (OUIs) to requesting organizations. An OUI value is used as the first3 bytes of a unique address.
Some LAN administrators prefer to assign their own local MAC addresses to NICs.
A frame whose destination is a broadcast address is sent to every system on a LAN.
A frame whose destination address is a multicast address is targeted at a group of systems on a LAN.
Ethernet addresses are transmitted with the least significant bit first. The first bits to be sent are the unicast/group flag and the universal/ local flag.
The most ...
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