Computer Network | Module 4: The Transport Layer by Prakhar Chauhan | Learn Smarter
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Module 4: The Transport Layer

The Transport Layer is essential in the TCP/IP protocol suite, bridging application-to-application communication. It includes protocols such as TCP and UDP, which fulfill distinct roles by managing logical communication, ensuring reliable data transfer, and optimizing flow and congestion control. The concepts of multiplexing and demultiplexing are integral to identifying the correct application processes using port numbers.

Sections

  • 4

    The Transport Layer

    The Transport Layer is essential for managing logical communication between application processes across hosts, ensuring reliable data transfer through protocols like TCP and UDP.

  • 4.1

    The Fundamental Role And Core Protocols Of The Transport Layer

    The Transport Layer serves as the bridge between host-to-host delivery and application-to-application communication, utilizing TCP and UDP protocols to achieve reliable data transfer.

  • 4.1.1

    The Indispensable Role Of The Transport Layer And The End-To-End Principle

    The Transport Layer is essential for establishing logical communication channels between application processes across different hosts, filling the gap left by the Network Layer.

  • 4.1.2

    Transport Layer Protocols: Tcp And Udp - A Comparative Analysis

    This section compares Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), highlighting their fundamental differences, uses, and characteristics within the transport layer of the TCP/IP model.

  • 4.1.3

    Process-To-Process Delivery: Multiplexing And Demultiplexing With Port Numbers

    This section discusses how the Transport Layer enables process-to-process delivery using port numbers, along with multiplexing and demultiplexing techniques.

  • 4.1.4

    Detailed Header Structures Of Udp And Tcp

  • 4.2

    Reliable Transmission Over An Unreliable Network

    This section examines how TCP ensures reliable data transfer despite the inherent unreliability of IP networking.

  • 4.2.1

    The Inherent Challenge: Unreliable Ip

    This section highlights the challenges inherent in the Internet Protocol (IP) regarding data transmission reliability, emphasizing the need for the Transport Layer, particularly TCP, to ensure accurate and complete data delivery.

  • 4.2.2

    Core Mechanisms For Reliable Data Transfer (Rdt)

    This section explores core mechanisms that enable reliable data transfer through TCP, highlighting sequence numbers, acknowledgments, timers, and retransmissions.

  • 4.2.3

    Fundamental Reliable Data Transfer (Rdt) Protocols

    This section covers the key RDT protocols, specifically Stop-and-Wait and Sliding Window, detailing their mechanisms for achieving reliable data transfer over potentially unreliable networks.

  • 4.3

    Tcp Connection Setup And Teardown

    This section covers the procedures for establishing and terminating TCP connections, highlighting the three-way handshake for connection setup and the four-way handshake for teardown.

  • 4.3.1

    Tcp Connection Setup: The Three-Way Handshake

    The TCP connection setup involves a three-way handshake process to establish a reliable connection between a client and server.

  • 4.3.2

    Tcp Connection Teardown: The Four-Way Handshake

    The TCP connection teardown process involves a systematic four-way handshake, allowing independent termination of data flow from both endpoints and ensuring proper resource management.

  • 4.4

    Flow Control And Congestion Control In Tcp

    This section explores flow control and congestion control mechanisms in TCP, focusing on their objectives, differences, and key algorithms.

  • 4.4.1

    Tcp Flow Control

    TCP Flow Control is a mechanism designed to prevent a fast sender from overwhelming a slow receiver, ensuring efficient data transfer.

  • 4.4.1.1

    Objective And Scope Of Flow Control

    Flow control in TCP is a mechanism that prevents a fast sender from overwhelming a slow receiver, ensuring efficient data transmission between hosts.

  • 4.4.1.2

    Mechanism In Tcp: The Advertised Receive Window

    The Advertised Receive Window is a crucial component of TCP's flow control mechanism, ensuring that data transfer rates do not overwhelm the receiver's capacity.

  • 4.4.2

    Tcp Congestion Control

    TCP Congestion Control mechanisms prevent network overload, ensuring efficient data transfer and fair bandwidth sharing.

  • 4.4.2.1

    Objective And Scope Of Congestion Control

    Congestion control aims to prevent network overload and manage traffic effectively, ensuring stable network performance.

  • 4.4.2.2

    Key Differences Between Flow Control And Congestion Control

    Flow control prevents a fast sender from overwhelming a slow receiver, while congestion control prevents the network from being overloaded by too much traffic.

  • 4.4.3

    Overview Of Tcp Congestion Control Mechanisms

    TCP congestion control mechanisms adjust the sending rate of data based on network conditions to prevent congestion.

  • 4.4.4

    Detailed Tcp Congestion Control Phases And Reactions

    This section explores the various phases and reactions involved in TCP congestion control, detailing how TCP maintains network stability and performance.

  • 4.4.5

    Tcp Congestion Control: Loss-Based Vs. Delay-Based Control

    This section explores the differences between loss-based and delay-based congestion control mechanisms in TCP, emphasizing how they handle network congestion.

Class Notes

Memorization

What we have learnt

  • The Transport Layer enables...
  • TCP provides reliable data ...
  • UDP, while faster and simpl...

Final Test

Revision Tests