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    2 007 Cisco S ystems, Inc. All rights reserved. Cisco Publ ic 1Version 4.0

    OSI Transport Layer

    Network Fundamentals Chapter 4

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    Transport layer

    Controlling of conversations

    Reliable communication

    TCP and UDP protocol

    Port addressing

    Segmentation and reassembly

    Reliable conversations

    Server processes

    Connestion establishment and termination

    Three-way handshake

    TCP session termination

    TCP protocol

    TCP session

    UDP protocol

    Segment reassembly

    Acknowledgement and windowing

    Retransmission

    Congestion controll minimize packet loss (window size)Overhead vs. reliability

    Datagram reassembly

    Server processes and requests

    Client processes

    Role and services

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    Objectives

    Transport Layer protocols and services communication between applications across network

    Analyze the application and operation ofTCP protocolthat support reliability, reassembly and manage

    data loss

    Analyze the operation ofUDP protocol

    Some applications using TCP or UDP protocol

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    Transport Layer Role and Services End-to-end data delivery to the proper application (e-amil, web, IM or server

    daemon) to the port

    If re

    quired, ordered and reliable data delivery error handling mechanizmus

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    Transport Layer Role and Services Major functions of the transport layer and the role it

    plays in data networks

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    Transport Layer Role and Services appropriate Transport layer protocol (reliable or low delay)

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    Transport Layer Role and Services UDP and TCP protocols characteristics (appropriate fields: reliable,

    de

    lay, network load, congestion avoidance vs )

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    Transport Layer Role and Services how a port numberis represented and the role port

    numbers play in the TCP and UDP protocols

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    Transport Layer Role and Services role ofsegments in the transport layer

    segments can be marked forreassembly

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    Application and Operation of TCP Mechanisms

    how the TCP reliability mechanism works as part of a session

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    Application and Operation of TCP Mechanisms port numbers and establishing TCP sessions and directing

    segments to server process

    Ako server rozli s ktorou intanciou web prehliadaa na mojom PC komunikuje?

    Akou mnoinou dajov je jednoznane uren spojenie medzi 2 aplikciami? (pre v program)

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    Application and Operation of TCP Mechanisms

    Three-way handshake in the establishment of TCP sessions

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    CODE BITS: SYN, ACK, FIN ...

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    Application and Operation of TCP Mechanisms

    TCP sessions termination

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    Managing TCP Sessions TCP sequence numbers are used to reconstruct the data stream

    with segments placed in the correct order

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    Managing TCP Sessions sequence numbers and acknowledgement numbers are used to

    manage exchanges in a conversation

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    Managing TCP Sessions retransmission remedy for lost data employed by TCP

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    Managing TCP Sessions manage data loss and congestion during a session change the

    window size

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    UDP Protocol characteristics of the UDP protocol and the types of

    communication for which it is best suited

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    UDP Protocol reassemble UDP PDUs at the destination device

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    UDP Protocol servers use port numbers to identify a specified application layer

    process and direct segments to the proper service or application

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    UDP Protocol port numbers are utilized in client-server communication

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    Summary


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