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1、Chapter2:TechnologyInfrastructure:TheInternetandtheWorldWideWebElectronicCommerceElectronicCommerce2ObjectivesInthischapter,youwilllearnabout:Theorigin,growth,andcurrentstructureoftheInternet因特網(wǎng)的起源、發(fā)展和結(jié)構(gòu)Howpacket-switchednetworksarecombinedtoformtheInternet包交換網(wǎng)絡(luò)HowInternetprotocolsandInte
2、rnetaddressingwork互聯(lián)網(wǎng)協(xié)議ThehistoryanduseofmarkuplanguagesontheWeb標(biāo)注語言ElectronicCommerce3Objectives(continued)HowHTMLtagsandlinksworkontheWorldWideWeb標(biāo)簽、超鏈接與WWWThedifferencesamonginternets,intranets,andextranets因特網(wǎng)、內(nèi)部網(wǎng)與外部網(wǎng)Internet2andtheSemanticWeb第二代互聯(lián)網(wǎng)與語義網(wǎng)絡(luò)ElectronicCommerce4TheInternetan
3、dtheWorldWideWebComputernetwork計(jì)算機(jī)網(wǎng)絡(luò)AnytechnologythatallowspeopletoconnectcomputerstoeachotherTheInternet因特網(wǎng)AlargesystemofinterconnectedcomputernetworksspanningtheglobeWorldWideWeb萬維網(wǎng)AsubsetofcomputersontheInternet1946EniacThehistoryofComputerThehistoryofCommunicationTechnologyElectronicC
4、ommerce7OriginsoftheInternet因特網(wǎng)的起源Early1960sU.S.DepartmentofDefensefundedresearchtoexplorecreatingaworldwidenetworkIn1969DefenseDepartmentresearchersconnectedfourcomputersintoanetworkcalledARPANETThroughoutthe1970sand1980sAcademicresearchersconnectedtoARPANETandcontributedtoitstechnologic
5、aldevelopmentsIn1991,theNSF:EasedrestrictionsoncommercialInternetactivityBeganimplementingplanstoprivatizetheInternetElectronicCommerce8GrowthoftheInternetElectronicCommerce9EmergenceoftheWorldWideWeb萬維網(wǎng)的興起TheWebSoftwarethatrunsoncomputersconnectedtotheInternetHypertextserver:超文本服務(wù)器Stores
6、fileswritteninthehypertextmarkuplanguageLetsothercomputersconnecttoitandreadfilesHypertextMarkupLanguage(HTML)超文本標(biāo)識(shí)語言Includesasetofcodes(ortags)attachedtotextElectronicCommerce10Packet-SwitchedNetworks包交換網(wǎng)絡(luò)Localareanetwork(LAN)局域網(wǎng)NetworkofcomputerslocatedclosetogetherWideareanetworks(WANs
7、)廣域網(wǎng)NetworksofcomputersconnectedovergreaterdistancesCircuit線路CombinationoftelephonelinesandclosedswitchesthatconnectthemtoeachotherCircuitswitching線路交換Centrallycontrolled,single-connectionmodelElectronicCommerce11Packet-SwitchedNetworks(continued)Packets數(shù)據(jù)包Filesande
