【精品】CCNA路由协议和概念 第8单元.doc

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1、1WhichOSIlayerisresponsibleforbinarytransmission,cablespecification,andphysicalaspectsofnetworkcommunication?CPresentation□TransportCDataLinkCPhysicalObservableDescriptionMaxValue1correctnessofresponse2pointsforOption40pointsforanyotheroption2Thisitemreferencescontentfromthefo

2、llowingareas:CCNAExploration:NetworkFundamentals•8.1.1PhysicalLayer・Purpose2Aninstalledfiberruncanbecheckedforfaults,integrity,andtheperformanceofthemediabyusingwhatdevice?Clightinjector□OTDRCTDRCmultimeterObservableDescriptionMaxValue1correctnessofresponse2pointsforOption20po

3、intsforanyotheroption2Thisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals8.3.8MediaConnectors1Whichcharacteristicsdescribefiberopticcable?(Choosetwo.)厂ItisnotaffectedbyEMIorRFI.厂Eachpairofcablesiswrappedinmetallicfoil.厂Itcombinesthetechniqueofcan

4、cellation，shieldingandtwistingtoprotectdata.厂Ithasamaximumspeedof100Mbps.厂ItisthemostexpensivetypeofLANcabling.ObservableDescriptionMaxValue1correctnessofresponseOption1andOption5arecorrect・1pointforeachcorrectoption.0pointsifmoreoptionsareselectedthanrequired.dThisitemreferen

5、cescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•8.3.6FiberMediaWhenisastraight-throughcableusedinanetwork?GwhenconnectingarouterthroughtheconsoleportCwhenconnectingoneswitchtoanotherswitchCwhenconnectingahosttoaswitchEJwhenconnectingaroutertoanotherrouterOb

6、servableDescriptionMaxValue1correctnessof2pointsforOption32response0pointsforanyotheroptionThisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•8.3.3UnshieldedTwistedPair(UTP)CableHostAHostBRefertotheexhibit・WhichtypeofCategory5cableisusedtomakean

7、EthernetconnectionbetweenHostAandHostB?□coaxcableLJrollovercableCcrossovercable□straight-throughcableObservableDescriptionMaxValue〔correctnessofresponse2pointsforOption30pointsforanyotheroption2Thisitemreferencescontentfromthefollowingareas:CCNAExploration:NetworkFundamentals•

8、8.3.3UnshieldedTwistedPair(UTP)CableWhichmethodofsignaltransm