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1、ComputernetworkingsummarizeNetworkingcanbedefinedasthelinkingofpeople,resourcesandideas.Networkingoccursviacasualencounters,meetings,telephoneconversation,andtheprintedwords.Nowthecomputernetworkingprovidehumanbeingswithnewnetworkingcapabilities.Computernetworkareimpor
2、tantforhumanservicesbecausehumanservicetasksareinformationintensive.Duringthehelpingprocess,informationistransmittedbetweenclients,coworkers,management,fundingsources,andpolicymakers.Toolswithrapidlyspeedupcommunicationwilldramaticallyaffecthumanservices.Computernetwor
3、khavebeengrowingexplosively.Twodecadesago,fewpeoplehadaccesstoanetwork.nowcomputercommunicationhasbecomeanessentialpartofourinfrastructure.Networkingisusedineveryaspectofbusiness,includingadvertising,production,shipping,planning,bulling,andaccounting.Consequently,mostc
4、orporationshavemultiplenetworks.Schools,atallgradelevelsformelementarythroughpost-graduate,areusingcomputernetworkstoprovidestudentsandteacherswithinstantaneousaccesstoinformationinon-linelibrariesaroundtheworld.Federal,state,andlocalgovernmentofficesusenetworks,asdomi
5、litaryorganizations.Inshort,computernetworksareeverywhere.Thegrowthinnetworkinghasaneconomicimpactaswell.Anentireindustryhasemergedthatdevelopsnetworktechnologies,products,and,services.Thepopularityandimportanceofcomputernetworkinghasproducedastrongdemandinjobsforpeopl
6、ewithmorenetworkingexpertise.Companiesneedworkerstoplan,acquire,install,operate,andmanagethehardwaresystemsthatcomprisecomputernetworksandinternets.Inadditioncomputerprogrammingisnolongerrestrictedtoindividualcomputers;programmersareexpectedtodesignandimplementapplicat
7、ionsoftwarethatcancommunicatewithsoftwareonothercomputers.Computernetworkslinkcomputersbycommunicationlinesandsoftwareprotocols,allowingdatatobeexchangedrapidlyandreliably.Traditionally,theyhavebeensplitbetweenwideareanetworks(WANs)andlocalareanetworks(LANs).AWANisanet
8、workconnectedoverlong-distancetelephonelines,andaLANisalocalizednetworkusuallyinonebuildingoragroupofbuildingscloseto
