初级课程-tcp_ip协议讲座1new

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1、Ethernet/TCP-IP-TrainingSuite01–TCP-IPIntroductionGenericinformationaboutTCP-IP2SMTP?FTP?BOOTP?DHCPHTTPPOP3???TFTPIPSNMP?ICMPPPP?DNS?ARPTelnet?UDP?TCPAlayeredprotocolstack3Application•Themaininterfacefortheuser.Layer•HigherlevelprotocolsTransport•End-to-endconnections(UDPandTC

2、P)Layer•Ensurereliability(TCP)Internet•Intra&Inter-NetworkcommunicationLayer•noguarantyofdeliveryDatalink•Intra-NetworkcommunicationLayer•TransportdataonthephysicalsupportTCP-IP:Encapsulation4UserDataTFTPUserHeaderDataUDPTFTPUserHeaderHeaderDataIPUDPTFTPUserHeaderHeaderHeaderD

3、ataEthernetIPUDPTFTPUserEthernetHeaderHeaderHeaderHeaderDataTrailerTCP-IP:KeyProtocols5IwanttoIPIPsenddatato127.127.127.127TransportLayerTCPUDPIwanttoUDPsendadatagramUDPInternetLayerontheport#IPIwanttoTCPsenddatainDatalinkLayerEthernetTCPareliablewaySTM32F4x7ontheport#PHYTCP-I

4、P:KeyProtocols6WhoknowsARPTransportLayerARP127.127.127.127’sMACaddress?TCPUDPInternetLayerIsendorICMPICMPreceivequeriesICMPPINGIPorerrormessages127.127.127.127ARPDatalinkLayerEthernetSTM32F4x7PHYTCP-IP:KeyApplicationlayerprotocols7ApplicationLayerBOOTPBOOTPDHCP/IwanttogetanDHC

5、PDNSDHCPBOOTPIPaddress?TransportLayerWhatisDNSTCPUDPDNStheIPaddressofwww.st.com?InternetLayerICMPIPARPDatalinkLayerEthernetSTM32F4x7PHYEthernet/TCP-IP-TrainingSuite01–TCP-IPIntroductionEthernet/TCP-IP-TrainingSuite02-ARPICMPDHCPDNSprotocolsTCP-IP:KeyProtocols(ARP)10TransportLa

6、yerWhoknowsARPARP192.168.0.10’sTCPUDPMACaddress?InternetLayerIPARPDatalinkLayerEthernetSTM32F4x7PHYWhyARPisneeded11•ApplicationonlyknowsIP(192.168.0.10)ARP•NetworkinterfaceonlyneedsMACdynamicmapping(02-00-00-00-00-00),neverdetectsIP--MACIP(192.168.0.10)IPMAC192.168.0.1002-00-0

7、0-00-00-00Demonstration12IP:static192.168.0.10IP:192.168.0.11DHCP192.168.0.xMAC:Dell_8c:fb:d1MAC:02-00-00-00-00-00ARPexample13QueryARPcacheARPcachePingARPcacheNewmappingisaddedWhathappened?14AddressResolutionProtocol(ARP)15TCP-IP:KeyProtocols(ICMP)16TransportLayerWhoknowsARPAR

8、P127.127.127.127’sTCPUDPMACaddress?InternetLayerIsendorICMPIC