Chapter 18 · General Network Concepts 175 Broadcast Broadcast routing is where data is sent to every single receiver on the system (or network segment). This approach is very simple and effective. On other hand, broadcasting can also be relatively inefficient, since every packet uses network bandwidth and receivers that don't need the data still have to deal with it. Multicast Multicast routing is where data is sent from one transmitter to many receivers. Multicast communications on a network maximize efficiency by optimizing the network infrastruc- ture to allow the sender to send a particular packet of data only once, even though the data is delivered to multiple receivers. Unicast Unicast routing is where data is sent directly from one point to another. Unicast simply means that packets from one sender are delivered to only one receiver, or vice-versa. ! ! ! ! ! ! Broadcast ! ! ! AB ! Multicast AB