NRL NORM is an implementation of NACK-Oriented
Reliable Multicast. The NORM protocol is designed
to provide end-to-end reliable transport of bulk
data objects or streams over generic IP multicast
routing and forwarding services. NORM uses a
selective, negative acknowledgement (NACK)
mechanism for transport reliability and offers
additional protocol mechanisms to conduct reliable
multicast sessions with limited "a priori"
coordination among senders and receivers. The
protocol offers a number of features to allow
different types of applications or possibly other
higher level transport protocols to utilize its
service in different ways. The protocol leverages
the use of FEC-based repair and other IETF
reliable multicast transport (RMT) building blocks
in its design.
