网络体系与协议复习提纲PPT课件.ppt

网络体系结构与协议 复习提纲 1 NetworkModel SAPsandtransmissionmodelSAPandPDUheader TransmissionFunctions 1 i j k 2 Data H SAPs PDUtype TransmissionFunctions 1 i j k 2 Data H 2 NetworkModel ICIbasicinfo Linklayer P2PLink MPlinkNetworkLayerTransportLayer ICI DU 3 NetworkModel ServiceprimitiveFunctionvs Service Services Services Data ACK Conn Req DU Open Conn Resp Opened Req Ind Resp Conf DU OpenFunction DataTransmissionFunction 4 NetworkModel PeerentitycriterionTransparentcriterion Entity Entity DU AddHeader processingHeader A1 A2 A3 B1 B2 B3 Channel 5 NetworkModel Independentcriterion Layer N Layer N 1 MAC PPP MAC PPP 6 NetworkModel Protocolstack IP TCP UDP L1 L2 L3 L4 L7 Protocolstack 1entity interfaces 1entity protocol 1entity protocol 1entity application 1entity interfaces 7 NetworkModel AddressstructureFlatHierarchyAddressingAddress Address Address 8 Protocol ReliabilityproblemErrordetectiontechniqueErrorrecoverytechniqueReliabletransmissiontechniqueConnectionorientandconnectionlessprotocol 9 Protocol ReliableprobabilityFrameerrorprobabilityReliabletransmissionprobabilityRetransmittoimprovethereliability pf pf 10 Protocol ErrorrecovertechniqueRetransmissionON NAKortimeoutCooperationtechniquePDUsequentialnumberSequencenumberadvanceACKProtocolStopandWaitGoBack NSelectiverepeatSendingwindowWsandreceivingwindowWr 11 Relay BasicRelayRepeater bridge router trans gateway app gatewayComplexrelayMultiplelayerrelayRelaytypeandpropertiesInprotocolrelayOutprotocolrelay 12 Relay RelayperformanceRelayonconnectionorientedRelayonconnectionlessRelayandprotocoltranslationBasicprotocoltranslationproblems 13 Relay RelayandQoSQueuemodelBasicrelayqueuetechniqueCQPQFQ WFQ 14 Interconnection InterconnectionmodelTunnelmodelOverlaymodelCommonanddifferenceproperties 15 Route ModelRoutingandroutedFIBRoutealgorithmAl