计算机水平考试-软件设计师分类模拟题计算机专业英语(二)

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1、MIDIenablespeopletouse1computersandelectronicmusicalinstruments.ThereareactuallythreecomponentstoMIDI,thecommunications112>H,theHardwareInterfaceandadistribution3calledHStandardMIDIFilesH.InthecontextoftheWWW,themostinterestingcomponentisthe4Format•Inprinciple,MID

2、IfilescontainsequencesofMIDIProtocolmessages•However,whenMIDIProtocol5arestoredinMIDIfiles,theeventsarealsotime-stampedforplaybackinthepropersequence•MusicdeliveredbyMIDIfilesisthemostcommonuseofMIDItoday.1>A.personalB•electronicC•multimediaD.network2、A.deviceB•pr

3、otocolC.networkD•controller3、A.formatB・textC•waveD.center4、A.VideoB・FaxmailC.GraphicD.Audio5、A.messagesB.packetsC.frameD•informationSpreadspectrumsimplymeansthatdataissentinsmallpiecesOveranumberofthe6frequenciesavailableforuseatanytimeinthespecifiedrange.Devicesu

4、sing7spreadspectrum(DSSS)communicateby8eachbyteofdataintoseveralpartsandsendingthemconcurrentlyondifferent9.DSSSusesalotoftheavailable10zabout22megahertz(MHz).6、A.continuousB•highC•lowD•discrete7、A.direct-sequenceB•discrete-•sequenceC•duplicate-sequenceD•dedicate-

5、sequence8、A.splittingB•combiningC•packingD・compacting9、A.bitsB•frequenciesC

6、nnetworksuse.13isaninteriorgatewayprotocolthatusesadistancevectoralgorithmtopropagateroutinginformation•14isatransfermodeinwhichalltypesofinformationareorganizedintofixedformcellsonanasynchronousornon-periodicbasisoverarangeofmedia.15isanidentifierofawebpage.11>A.

7、ICMPB・SMTPC.IGMPD.ARP12^A.4B/5BB・CRCC.ManchesterCodeD.Huffman13、A.OSPFB.RIPC.RARPD・BGP14、A.ISDNB.X.25C.FrameRelayD.ATM15、A.HTTPB.URLC.HTMLD.TAGCodeNetworkscanbeinterconnectedbydifferentdevices.Inthephysicallayernetworkscanbeconnectedby16orhubs,whichjustmovethebits

8、fromonenetworktoanidenticalnetwork•Onelayerupwefindbridgesandswitcheswhichoperateatdatalinklayer.Theycanaccept17zexaminetheMACaddressandforwardtheframes