计算机网络技术20109试题答案

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1、计算机网络技术2010.9试题答案InSeptember2010,thenationalcomputerlevel3InternettechnologypapertestOne,thechoice(onepoint,60points)(1)theChineseacademyofsciencesfirstimplementedInternetconnectionwithStanforduniversityinJune1991.ItbegantobeinA)electronicphysicsB)computingtechnologyC

2、)highenergyphysicsD)biochemistry⑵inthedescriptionofthecomputerapplication,thecorrectoneisA)embeddedprocesscontroldevicesareusuallyimplementedwithhigh-endmicrocomputersB)manufacturingthroughvirtualprototypingcanshortenthetimeofproductionC)expertdiagnosticsystemsarealre

3、adywellabovethedoctor'slevelD)asupercomputercanaccuratelypredictearthquakes(3)inthedescriptionoftheclientmachine,theerrorisA)workstationscanbeusedbyclientsB)smartphonescanbeusedbydientsC)laptopscanbeusedforclientsandcanbewirelesslyconnectedtotheInternetD)thedesktopcan

4、beusedasaclient,notwireless(4)inthedescriptionofthecomputerconfiguration,thecorrectoneisA)SATAistheserialinterfaceharddrivestandardB)SASistheparallelinterfaceharddrivestandardC)LCDisalight-emittingdiodedisplay1D)aPDAisasuper-portablecomputer(5)inthedescriptionofsoftwa

5、re,theerrorisA)softwareconsistsofprogramsandrelateddocumentsB)systemsoftwarerunsonhardwareC)PhotoshopiscommercialsoftwareD)MicrosoftOfficebelongstoshareware(3)inthedescriptionofimagecompression,thecorrectoneisA)imagecompressionisnotallowedtouselossycompressionB)theint

6、ernationalstandardismostlymixedC)theencodingofinformationislossyD)predictivecodingislosslesscompression(4)inthedescriptionoftheOSIreferencemodel,theerrorisA)thenetworkarchitecturedevelopedbytheISOB)itiscalledtheopensysteminterconnectionreferencemodelC)thecommunication

7、functionsofthenetworksystemaredividedintosevenlevelsTheunderlyinglayerofamodeliscalledahostnetworklayer(5)networktopologybasedonhubsEthernetA)treetopologyB)networktopologyC)startopologyD)toroidaltopology(3)thecorrectdescriptionoftheerrorrateiscorrectA)describestheprob

8、abilityoftransmissionofbinarydatainAcommunicationsystemB)usedtomeasurethereliabilityofcommunicationsystemsinabnormalconditio