TSN in SCTP (Stream Control Transmission Protocol) stands for Transmission Sequence Number. It is a 32-bit identifier used to uniquely identify each chunk of data sent by an SCTP endpoint. TSNs are assigned to chunks when they are transmitted and are used to detect and handle out-of-order delivery, retransmissions, and duplicate chunks at the receiver’s end. TSNs play a crucial role in SCTP’s reliable and ordered delivery mechanism, ensuring that data chunks are delivered correctly and in sequence to the application layer.
In SCTP, TSN (Transmission Sequence Number) serves as a fundamental mechanism for tracking and managing data chunks within an association between two endpoints. Each TSN is assigned to a chunk of data when it is transmitted, allowing the receiving endpoint to acknowledge receipt and sequence them appropriately. TSNs enable SCTP to provide features such as reliable and ordered delivery, as well as selective retransmission of lost or delayed data chunks based on their unique identifiers.
In Wireshark, TSN (Transmission Sequence Number) refers to a field displayed in SCTP packet captures. Wireshark is a network protocol analyzer that allows users to inspect and analyze the contents of packets traversing a network. When capturing SCTP packets, Wireshark displays various fields including TSN, which represents the Transmission Sequence Number assigned to each SCTP data chunk. Wireshark provides detailed visibility into the SCTP protocol operation, allowing network administrators and developers to diagnose issues, monitor traffic, and troubleshoot communication problems effectively.
SSN in SCTP (Stream Sequence Number) refers to the Sequence Number used within an SCTP stream. SCTP supports the concept of multiple streams within a single association, allowing applications to send and receive independent streams of data. The SSN is a 16-bit field used to sequence data chunks within a specific stream. It ensures that data sent on different streams is delivered in order and without interference, maintaining the logical separation and integrity of data streams within an SCTP association.
Congestion control in SCTP (Stream Control Transmission Protocol) refers to the mechanism used to manage and mitigate network congestion during data transmission. SCTP employs a congestion control algorithm to monitor the network conditions, detect congestion signals (such as packet loss or delays), and adjust its transmission rate accordingly to avoid further congestion and ensure fair bandwidth allocation. SCTP’s congestion control mechanisms include algorithms for calculating the appropriate transmission rate, adjusting the window size for flow control, and implementing congestion avoidance strategies to maintain efficient data delivery without overwhelming the network. These mechanisms are crucial for ensuring reliable and efficient performance of SCTP in diverse network environments.