Satellite television: US Patent: 4,381,562: Broadcast type satellite communication methods by Anthony Acampora, April 26, 1983, assigned to Bell Labs. movie mania Unicast transmission, wherein a packet is shipped from a single source to a specified destination, remains to be the predominant type of transmission on LANs and within the Internet. All LANs (e.g. Ethernet ) and IP networks help the unicast transfer mode, and most customers are accustomed to the standard unicast functions (e.g. http, smtp, ftp and telnet) which employ the TCP transport protocol.