CCNA认证基础-习题分析讲义第一部分第一章1.Convertthebinarynumber10111010intoitshexadecimalequivalent.Selectthecorrectanswerfromthelistbelow.（3）1)852)903)BA4)A15)B36)1C2.ConverttheHexadecimalnumberA2intoitsBase10equivalent.Selectthecorrectanswerfromthelistbelow.（4）1)1562)1583)1604)1625)1646)1663.Whichbinarynumberisarepresentationofthedecimalnumber248?（3）1)111010002)111101003)111110004)111110104.Whichofthefollowingwilltesttheinternalloopbackofanode?（3）1)ping10.10.10.12)ping192.168.1.13)ping127.0.0.14)ping223.223.223.2235)ping255.255.255.2555.Whatcanbeverifiedbysuccessfullypingingthereservedloopbackaddressonahost?（2）1)ConnectivityexistsbetweentwohostsontheLAN.2)TheTCP/IPstackofthelocalhostisconfiguredcorrectly.3)Aconnectionexistsbetweenahostandthedefaultgateway.4)Therouteapackettakesfromthelocalhosttoaremotehostisvalid.6.WhichofthefollowingcommandscouldbeusedonaWindows-basedcomputertoviewthecurrentIPconfigurationofthesystem?(Choosetwo.)（3，4）1)configip2)ifconfig3)ipconfig4)winipcfg5)Winipconfig7.Refertotheexhibit.WhatmustbeconfiguredonHostBtoallowittocommunicatewiththeHostC?(Choosethree.)（2，4，6）1)theMACaddressofRTArouterinterfaceconnectedtoSwitch12)auniquehostIPaddress3)theIPaddressofSwitch14)thedefaultgatewayaddress5)theMACaddressofHostC6)thesubnetmaskfortheLAN8.Whatareimportantcharacteristicstoconsiderwhenpurchasinganetworkinterfacecard?(Choosetwo.)（2，3）1)securityusedonthenetwork2)mediausedonthenetwork3)systembususedonthecomputer4)softwareinstalledonthenetwork5)diagnostictoolsinstalledonthenetwork第二章1.Selectthenecessaryinformationthatisrequiredtocomputetheestimatedtimeitwouldtaketotransferdatafromonelocationtoanother.(Choosetwo.)（1，5）6)filesize7)dataformat8)networkinuse9)typeofmedium10)bandwidthofthelink9.UsingthedatatransfercalculationT=S/BW,howlongwouldittakea4MBfiletobesentovera1.5Mbpsconnection?（2）1)52.2seconds2)21.3seconds3)6.4seconds4)2seconds5)0.075seconds6)0.0375seconds10.WhatarefeaturesoftheTCP/IPTransportlayer?(Choosetwo.)（3，5）1)pathdetermination2)handlesrepresentation,encodinganddialogcontrol3)usesTCPandUDPprotocols4)packetswitching5)reliability,flowcontrolanderrorcorrection11.WhichofthefollowingistheLayer4PDU?（4）1)bit2)frame3)packet4)Segment12.WhatisimportanttorememberaboutthedatalinklayeroftheOSImodelwhenconsideringPeertoPeercommunication?(Choosethree.)（3，4，5）1)Itlinksdatatothetransportlayer.2)Itencapsulatesframesintopackets.3)Itprovidesaservicetothenetworklayer.4)Itencapsulatesthenetworklayerinformationintoaframe.5)Itsheadercontainsaphysicaladdresswhichisrequiredtocompletethedatalinkfunctions.6)Itencodesthedatalinkframeintoapatternof1sand0s(bits)fortransmissiononthemedium.13.Whichstatementdescribesastartopology?（2）1)Eachhostinthenetworkisconnectedtoabackbonecablethatisterminatedatbothends.2)Eachhostisconnectedtoahuborswitch,eitherofwhichactsasacentralpointforallnetworkconnections.3)Eachhostisdirectlyconnectedtotwootherhoststoformalongchainofhosts.4)Eachhosthasaconnectiontoallotherhostsinthenetwork.14.Whichstatementsdescribethelogicaltoken-passingtopology?(Choosetwo.)（2）1)Networkusageisonafirstcome,firstservebasis.2)Computersareallowedtotransmitdataonlywhentheypossessatoken.3)Datafromahostisreceivedbyallotherhosts.Electronictokensarepassedsequentiallytoeachother.4)Tokenpassingnetworkshaveproblemswithhighcollisionrates.1...
