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Comprehensive Service Specification for Transport Layer Connection Management

This document outlines the specifications for managing connections at the transport layer, detailing the end-to-end control mechanisms critical for network communication. It covers various interface requests and indications, including Connection Request (Creq), Connection Indication (Cind), Disconnection Request (Dreq), and confirms (Cconf, Dconf). The specification emphasizes mutual exclusion principles to ensure reliable connections and disconnections through defined procedures. It is essential for understanding the Transmission Control Protocol (TCP) and establishing reliable end-to-end transport mechanisms.

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Comprehensive Service Specification for Transport Layer Connection Management

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  1. CIS 725 Service Specification

  2. Transport Layer • Connection management • End-to-end control Application A F Transport layer Network layer

  3. Mutual exclusion • Request • Enter • Release

  4. Interface • Creq (Connection Request) • Cind (Connection Indication) • Cres (Connection response) • Cconf (Connection confirm) • Dreq (Disconnection request) • Dind (disconnection indication)

  5. Interface • Creq (Connection Request) • Cind (Connection Indication) • Cres (Connection response) • Cconf (Connection confirm) • Dreq (Disconnection request) • Dind (disconnection indication) • Dres (Disconnection response) • Dconf (disconnection confirm)

  6. 1 Creq1 Cconf1 Dreq1 Cind2 Cres2 Dind2 ?Creq1 ?Dreq1 ?Dreq1 !Dind2 !Dind2 !Dind2 ?Dreq1 2 6 7 7 7 !Cind2 !Cind2 ?Cres2 5 4 3 ?Cres2 !Cconf1 6 7 !Dind2 ?Dreq1

  7. ?creq1 ?creq2 ?creq2 !cind1 !cind2 ?creq2 ?creq1 ?creq1 ?cres1 ?cres2 !cconf2 !cconf1

  8. ?creq1 ?creq2 !cind1 !cind2 ?creq1 ?creq2 ?creq2 !cind2 ?creq1 ?cres1 ?cres2 !cconf2 !cconf1

  9. Transmission Control Protocol • End-to-end transport protocol • End point (IP address, port)

  10. TCP connection establishment

  11. CIS 725 Lecture 16

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