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Stream Control Transmission Protocol

Stream Control Transmission Protocol is a new(ish) transport protocol standardised by the IETF. It was originally meant to be used to carry signaling traffic only and was designed by SigTran. However, at the bequest of the IETF, it became a general purpose transport protocol and is positioned in the same place of the TCP/IP protocol stack as TCP. It is quite reasonable to suggest that SCTP is the Next-Generation TCP, similar to how IPv6 is meant to supercede IPv4.

SCTP provides support for connection-oriented point-to-poing communication over an IP-based network. It supports a number of key features, some are which are adopted from TCP, others which differentiate it from TCP. These are:

  • Reliable Connection Orientated Transport Protocol. SCTP connections are referred to as Associations.
  • An extensible and simple packet format.
  • Transport of Discrete Messages.
  • Support for Multi-streaming within an Association.
  • Support for both Ordered and Unordered Messages within a Stream.
  • Support for Multi-homing.
  • Enhanced Protection against Denial-of-Service attacks and hi-jacking of an Association by a third-party.
To read more about a feature, click on the link above. Note that as this is a work in progress, not all features are fully described.

This page will discuss and provide links for SCTP, a new(ish) transport protocol standardised by the IETF.

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