This presentation will explain RIST (Reliable Internet Stream Transport), a new protocol for professional video transport that is evolutionary. It is a protocol designed to allow for packet retransmissions between broadcast equipment, something which in the past had been vendor specific. Unusually for professional standards, it has a public specification and thus has already been implemented in a number of open source projects. This talk will took about the good parts and the bad parts as well as comparing it with traditional transport protocols such as TCP.