Good catch, I think the article needs a fix. As I read it, at the edges, everything is TCP/IP. Over satellite, IP multicast (UDP) is used for live audio, and un

Good catch, I think the article needs a fix. As I read it, at the edges, everything is TCP/IP. Over satellite, IP multicast (UDP) is used for live audio, and unidirectional file broadcast (using a proprietary protocol with inline forward error correction) for program files.