Data communication computer science concept

Feb 3rd, 2012
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This consists of important concepts on Local Area Networks.This notes summarize the Local Area Networks concept such that it's easier to grasp the concepts without much time.

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ITS323ProtocolsMotivationSimpleArchitectureTCP/IPStandardsProtocol Architectures and InternetApplicationsAddressingTCP/IP OperationApplicationsITS323: Introduction to Data CommunicationsSirindhorn International Institute of TechnologyThammasat UniversityPrepared by Steven Gordon on 23 May 2012ITS323Y12S1L02, Steve/Courses/2012/s1/its323/lectures/protocols.tex, r2334ITS323ContentsProtocolsMotivationSimpleArchitectureTCP/IPThe Need for a Protocol ArchitectureA Simple Protocol ArchitectureStandardsAddressingTCP/IP OperationThe TCP/IP Protocol ArchitectureApplicationsProtocols and StandardsAddressing in TCP/IPExample of TCP/IP OperationInternet Applications and PerformanceITS323What is a Protocol?ProtocolsMotivationSimpleArchitectureISet of rules that two (or more) peer entities obey inorder to communicateISyntax: format of data blocks; types of messagesIProcedures: set of rules each peer must follow; timinginformationTCP/IPStandardsAddressingTCP/IP OperationApplicationsITS323The Need for a Protocol ArchitectureProtocolsMotivationSimpleArchitectureTCP/IPStandardsIIData communications is complex!Apply divide-and-conquer principle:IIIBreak communication tasks into subtasksImplement subtasks separately in layersLayers arranged in vertical stackAddressingITCP/IP OperationIApplicationsIILayer N uses services of layer N 1Layer N provides services to layer N + 1Peer

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