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1、InternetTheInternetalsoknownastheNetistheworld'slargestcomputernetwork.“Andwhatisanetwork”?Youmayask.Acomputernetworkisbasicallyabunchofcomputersbookedtogethersomehow.Inconcept,it'ssortoflikearadioorTVnetworkthatconnectabunchofradioorTVstations.Somecomputernetworksconsistofacentr
2、alcomputerandabunchofremotestationsthatreporttoit-acentralairlinereservationcomputer,forexample,withthousandsofterminalsatairportsandtravelagencies.Other,includingtheInternet,permitanycomputeronthenetworktocommunicatewithanyother.TheInternetisprobablythemostopennetworkintheworld.
3、ThousandsofcomputersprovidefacilitiesthatareavailabletoanyonewhohasNetaccess.Thissituationisunusual-mostnetworksareveryrestrictiveinwhattheyallowuserstodoandrequireapecificarrangementsandpasswordsforeachservice.Althoughafewpayservicesexist,thevastmajorityofInternetservicesarefree
4、forthetaking,onceyouconnected.Ifyoudon'talreadyhaveaccesstotheInternetthroughyourcompany,yourschool,you'llprobablyhavetopayforaccesstotheInternetbyusingInternetaccessprovider.“HowdoIgettotheInternet?”Welldependingonyourlifestyle,includingyourjoboryourschool,checkingouttheInternet
5、canbetriviallyeasyormoderatelydifficult.(1)ModemAmodemisalittledevicethatenablesdatafromonecomputertotraveltoanothercomputerbyusingordinarytelephonelines.Thiscutelittleboxgoesbetweenyourandyourphonelineandbetweenthephonelineandthecomputerontheotherend.modemarebuilt-intosomecomput
6、er,soifyou'venotsurewhetheroneisinyourcomputer,ask.Ifyouneedtobuyamodem,findthecheapestfaxmodemthatrunsat14400hps.Youcanpaymoreforthingsthatgofaster,butthatspeedisn'treallypassedontoyoubyusingyourordinaryphonelinejustnow.Makesurethatyourmodemcomeswithsomecommunicationssoftwaretha
7、t'sappropriateforthecomputerandversionofoperatingsystemyou'reusing.TheInternetisouttherewithtonsofexcitingthingstodo,butyouhavetoitthroughyourschoolorwork.ThefolkswhoprovideaccesstotheInternet(generallyforafee)arecalledInternetServiceProviders.(2)On-lineOn-lineserviceareservicesp
8、rovidedtoyoubyacomputerorcomputersintera
