The broadcast MAC is FF:FF:FF:FF:FF:FF. Frames sent here reach every device on the local network. Multicast MACs start with 01:00:5E for IPv4 multicast. They reach a group of devices, not everyone. When you see the least significant bit of the first byte set to , it's multicast. Broadcast and multicast frames can flood your network if overused.
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$ curl repovive.com/roadmaps/network-design/physical-and-data-link-fundamentals/broadcast-and-multicast-macs
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