The Layered Coding Transport (LCT) Building Block provides transport
level support for reliable content delivery and stream delivery
protocols. LCT is specifically designed to support protocols using
IP multicast, but it also provides support to protocols that use
unicast. LCT is compatible with congestion control that provides
multiple rate delivery to receivers and is also compatible with
coding techniques that provide reliable delivery of content. This
document obsoletes RFC 3451. [STANDARDS-TRACK]