CH9 - Chapter 9: Transport Layer Introduction to Networks...

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Introduction to Networks v5.1Chapter 9:Transport Layer
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public29.0 Introduction9.1 Transport Layer Protocols9.2 TCP and UDP9.3 Summary
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public3Upon completion of this section, you should be able to:Describe the purpose of the transport layer in managing the transportation ofdata in end-to-end communication.Describe characteristics of the TCP and UDP protocols, including port numbersand their uses.
Cisco Public© 2013 Cisco and/or its affiliates. All rights reserved.4
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public5The transport layer isresponsible for establishing atemporary communicationsession between twoapplications and deliveringdata between them.The transport layer providesservices, such as:oConnection-oriented datastream supportoReliabilityoFlow controloMultiplexing
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public6Track Individual ConversationsBy tracking each individualconversation flowing between asource application and a destinationapplication separately.
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public7Segment Data andReassemble SegmentsBy dividing the data intosegments that are easier tomanage and transport.
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public8Identify the ApplicationsBy ensuring even whenmultiple applications arerunning on a device, allapplications receive thecorrect data.
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public9Segmenting the data intosmaller chunks enables manydifferent communications,from many different users, tobe interleaved (multiplexed)on the same network.The transport layer adds aheader that contains binarydata to identify each segmentof data and to enable varioustransport layer protocols toperform different functions inthe management of datacommunication.
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public10The transport layer is also responsible for managing reliability.Some applications may not require reliability. Transport layer requirements vary fromapplication to application.TCP/IP suite provides two transportlayer protocols, Transmission ControlProtocol (TCP) and User DatagramProtocol (UDP).IP uses these transport protocols toenable hosts to communicate andtransfer data.TCP is considered a reliable,full-featured transport layer protocol,which allows for packet data deliveryconfirmation.In contrast, UDP is a very simpletransport layer protocol that does notprovide any reliability.
© 2013 Cisco and/or its affiliates. All rights reserved.Cisco Public11TCP transport is reliable because it supports packet deliveryconfirmation.There are three basic operations that enable reliability with TCP:oNumbering and tracking data segments transmitted to a specifichost from a specific applicationoAcknowledging received dataoRetransmitting any unacknowledgeddata after a certain period of time

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Term
Fall
Professor
Tim Stroth
Tags
Chapter 9, Transmission Control Protocol, Cisco Public

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