Q & A on Link Layer Broadcast Q: Could you explain what is meant by a link layer broadcast and how it differs from an ordinary broadcast. A: The term ``link layer broadcast'' refers to broadcast performed by the layer 2 of the protocol stack (e.g., and Ethernet broadcast). The term is used to distinguish lower-layer broadcasts from IP broadcast (e.g., a directed broadcast, which means sending an IP single IP datagram across the Internet and then broadcasting it on the destination network).