【精品】CCNA路由协议和概念-第4单元.doc

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2、BitOBit15Bit16Bit311SourcePort13357DestinationPort23Sequer)8Number43693AcknowlegementNumber8732HeaderLength--Reserved——CodeBits--Window12000ChecksumUrgentBasedonthetransportlayerheadershowninthediagram,whichofthefollowingstatementsdescribetheestablishedsession?(Choosetwo.)厂ThisisaUDPheade

3、r.厂ThiscontainsaTelnetrequest.厂ThiscontainsaTFTPdatatransfer.厂ThereturnpacketfromthisremotehostwillhaveanAcknowledgementNumberof43693.ThisisaTCPheader.ObservableDescriptionMaxValue1correctnessofresponseOption2andOption5arecorrect.1pointforeachcorrectoptiori.0pointsifmoreoptionsareselectedt

4、hanrequired・2Thisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•4.1.5PortAddressingWithTCP/IPdataencapsulation,whichrangeofportnumbersidentifiesallwell-knownapplications?C0to255C256to1022C0to1023C1024to2047C49153to65535ObservableDescriptionMaxValue1correctne

5、ssofresponse2pointsforOption30pointsforanyotheroption2Thisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•4.1.5PortAddressing3WhyareportnumbersincludedintheTCPheaderofasegment?CtoindicatethecorrectrouterinterfacethatshouldbeusedtoforwardasegmentCtoidentifywhi

6、chswitchportsshouldreceiveorforwardthesegmentCtodeterminewhichLayer3protocolshouldbeusedtoencapsulatethedataCtoenableareceivinghosttoforwardthedatatotheappropriateapplicationCtoallowthereceivinghosttoassemblethepacketintheproperorderObservableDescriptionMaxValue1correctnessofresponse2point

7、sforOption40pointsforanyotheroption2Thisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•4.1.5PortAddressingWhichOSImodellayerisresporisibleforregulatingtheflowofinformationfromsourcetodestination,reliablyandaccurately?□application□presentationCsessionCtranspo

8、rtCnetworkObservableDescriptionMaxValue1correctnessofresponse2pointsforOption40pointsforanyotheroption2Thisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•4.1.1PurposeoftheTransportLayerHostAServer1Refertotheexhibit・HostAisusingF