高级网络技术-IPv4 Addressing(思科教材)ppt课件.ppt

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1、AddressingtheNetwork–IPv4ObjectivesTheFormatofIPv4AddressesAddressesforDifferentPurposeAssigningIPv4AddressesIsItOnMyNetwork?ARPProcessPlanningIPv4AddressesTestingtheNetworkLayerTheRoleofTheIPv4ProtocolIPv4packetheaderIPv4AddressesTheAnatomy(构造)ofanIPv4Address32bit

2、DottedDecimal(点分十进制)NetworkandHostPortionsBinarytoDecimalConversionDecimaltoBinaryConversion常见二进制数1131117111115111113111111163111111112711111111255快速计算：2^n-1n为1的个数10000000128110000001921110000022411110000240111110002481111110025211111110254快速计算：256-2^nn为0的个数1021004

3、1000810000161000003210000006410000000128快速计算：2^nn为0的个数AddressesforDifferentPurposeLegacyIPv4addressingTypesofAddressesinanIPv4networkNetworkaddress-Theaddressbywhichwerefertothenetwork.Itisthelowestaddressisreservedforthenetworkaddress.(Allhostbitsis0)Broadcastaddr

4、ess-Aspecialaddressusedtosenddatatoallhostsinthenetwork.Itisthehighestaddressinthenetworkrange.(Allhostbitsis1)Hostaddresses-Theaddressesassignedtotheenddevicesinthenetwork.CalculatingNetwork,HostsandBroadcastAddressesNetworkPrefixesThenumberofbitsintheaddressthatg

5、ivesusthenetworkportion.CalculatingNetwork,Hosts,andBroadcastAddressesUnicast,Broadcast,Multicast–TypesofCommunicationLimitedLocalbroadcastaddress（受限本地广播地址）STOP255.255.255.255Directedbroadcastaddress（直接广播地址）192.168.20.255192.168.20.0192.168.1.0Publicaddressandpriva

6、teaddressPublicAddressesPrivateaddress（RFC1912）10.0.0.0to10.255.255.255(10.0.0.0/8)172.16.0.0to172.31.255.255(172.16.0.0/12)192.168.0.0to192.168.255.255(192.168.0.0/16)NAT（网络地址翻译）SpecialIPv4addressesNetworkandBroadcastAddressesDefaultRoute:0.0.0.0Loopback:127.0.0.0

7、/8Link-LocalAddresses:169.254.0.0/16TEST-NETAddresses:192.0.2.0/24AssigningAddressesWhoAssignstheDifferentAddresses?TheorganizationofaddressmanagementPlanningtoAddressestheNetworkIt’sastructureprocess,shouldbeplannedanddocumented.PreventingduplicationofaddressesHos

8、tsareassociatedwithanIPv4networkbyacommonnetworkportionoftheaddressThedifferenttypesofhostswithinanetworkEnddevicesforusersServersandperipheralsI