Transmission Sequence Number

What Does Transmission Sequence Number Mean?

A transmission sequence number (TSN) is a 32-bit internal numerical sequence number assigned to data fragments by Stream Control Transmission Protocol (SCTP). TSNs are independent of other stream sequence level numbers and acknowledged by receiving end points, even during sequencing gaps. Fragments are then reassembled before they are passed to SCTP clients, which ensure reliable sequenced stream delivery.

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Techopedia Explains Transmission Sequence Number

The following are TSN attributes:

  • Ensure that lower layer packets conform to the maximum transmission unit path.
  • Facilitate endpoint acknowledgment.
  • Provide duplicate delivery detection.
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Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…