现代计算机网络 - 计算机科学技术系

2020/2/221计算机网络华东师范大学计算机系张卫2020/2/222教学安排主要参考书：AndrewS.Tanenbaum，ComputerNetworks(FourthEdition)基本要求：独立完成书中的习题鼓励提问，保持课堂安静期末闭卷考试2020/2/2231.IntroductionTheDefinitionofComputerNetworkResourceSharingConnectionIndependentcomputerSharableResource:Hardware/Software/ConmunicationLine/InformationTheWaytoSharingDifferentfromdistributesystemConnection：Media/Distance/Architecture/Protocol02:31:1042.ThePhysicalLayerDefinesthemechanical,electrical,andtiminginterfaceTransmissionmediaExamplesofcommunicationsystems02:31:1052.1TheTheoreticalBasisforDataCommunicationFourierAnalysisBandwidth-LimitedSignalsMaximumDataRateofaChannelTheDataLinkLayerChapter3Object:reliable,efficientcommunicationbetweentwoadjacentmachines.3.1DataLinkLayerDesignIssuesServicesProvidedtotheNetworkLayerFramingErrorControlFlowControl02:318TheMediumAccessControlSublayerChapter402:3194.1TheChannelAllocationProblemSharingBroadcastingMediumMultiplexingStaticChannelAllocationDynamicChannelAllocation02:3110TheNetworkLayerGoal:end-to-endtransmissionChapter502:31115.1NetworkLayerDesignIsuesStore-and-ForwardPacketSwitchingServicesProvidedtotheTransportLayerImplementationofConnectionlessServiceImplementationofConnection-OrientedServiceComparisonofVirtual-CircuitandDatagramSubnets02:31:1012Chapter6TheTransportLayerHeartofthewholeprotocolhierarchy.Providingreliable,cost-effectivedatatransportfromthesourcetothedestination02:31:10136.1TheTransportServiceServicesProvidedtotheUpperLayersConnection-orientedandconnectionlessSubnetvsHostTransportServicePrimitivesAstandardsetofprimitivesandworkonawidevarietyofnetworksBerkeleySocketsAnExampleofSocketProgramming:AnInternetFileServer14TheApplicationLayerChapter7157.1DNS–TheDomainNameSystemMapASCIIstringsontonetworkaddressesThereasonsforusingDNSThesizeofthefilewouldbecometoolarge.HostnameconflictswouldoccurconstantlyTheloadandlatency.AhierarchicalDomain-basednamingschemeAdistributeddatabasesystemTheDNSNameSpaceResourceRecordsNameServersChapter8NetworkSecurity8.1CryptographyIntroductiontoCryptographySubstitutionCiphersTranspositionCiphersOne-TimePadsTwoFundamentalCryptographicPrinciples