http://www.rfc-editor.org/rfc/rfc6968.txt
RFC 6968: FCAST: Object Delivery for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) Protocols, V. Roca, B. Adamson2013-07-01T23:00:00-00:00This document introduces the FCAST reliable object (e.g., file) delivery application. It is designed to operate either on top of the underlying Asynchronous Layered Coding (ALC) / Layered Coding Transport (LCT) reliable multicast transport protocol or the NACK-Oriented Reliable Multicast (NORM) transport protocol.