[1] [CITE@en[RFC 6968 - FCAST: Object Delivery for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) Protocols]]
( ([TIME[2014-09-14 18:07:31 +09:00]] 版))
<https://tools.ietf.org/html/rfc6968#section-2.2>