Stream Control Transmission Protocol (SCTP) Associations

This second in a series of articles on the SCTP network protocol examines associations and connections.

This article has discussed a feature novel to SCTP, streams. A stream allows multiple data channels on a single association. This avoids a major problem of TCP, head-of-line blocking, but it also allows applications that deal with multiple logical streams to be written more easily. The next and final article will look at how SCTP can handle multiple associations at once, simplifying the TCP model and also offering improvements over the UDP connection model.

Jan Newmarch is Honorary Senior Research Fellow at Monash University. He has been using Linux since kernel 0.98. He has written four books and many papers and given courses on many technical topics, concentrating on network programming for the last six years. His Web site is


Jan Newmarch has written many books and papers about software engineering, network programming, user interfaces and artificial intelligence, and he is currently digging into the IoT.