P2PTV
Transmitting live TV or on-demand TV using a peer-to-peer architecture, in which the receiving users also function as servers to others. P2P TV is the streaming counterpart of P2P systems such as BitTorrent.
IPTV
IPTV (Internet Protocol television) is a service that provides television programming and other video content using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite, as opposed to broadcast TV, cable TV or satellite signals.