A narrowcast is the transmission of data to a specific list of recipients. Cable television is an example of narrowcasting since the cable TV signals are sent only to homes that have subscribed to the cable service. In contrast, terrestrial TV uses a broadcast model in which the signals are transmitted everywhere and anyone with an antenna can receive them. The terms multicast and narrowcast are often used interchangeably, although narrowcast usually refers to the business model whereas multicast refers to the actual technology used to transmit the data.