In OSPF, with Broadcast Multiaccess Topologies (i.e. Ethernet), the Multicast IP addresses are mapped to MAC-level multicast addresses. I was unaware that there were multicast MAC addresses available ...

When the ARPANET was designed in the late 1960s, it was outfitted with a Network Control Protocol (NCP) that made it possible for the very different types of hosts connected to the network to talk ...