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请参照图17-21，在路由器上完成销售部网段NAT的部分配置。 … Router(config)#ip nat pool xiaoshou 61.246.100.99 61.246.100.99 ...
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某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.168.5
[说明]如图11A-2-1所示某单位通过2Mbps的DDN专线接入广域网该单位内网共分为三个子网服务
如图1—1所示某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.
某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.168.5
某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.168.5
某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.168.5
如图13-1所示某单位通过2M的DDN专线接入广域网该单位的内网分为三个子网服务器放置在子网192
如图12-1所示某单位通过2M的DDN专线接入广域网该单位内网分为三个子网服务器放置在子网19
请参照图17-21在路由器上完成销售部网段NAT的部分配置Routerconfig#ipnatpoo
某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.168.5.0
如图12-1所示某单位通过2M的DDN专线接入广域网该单位内网分为三个子网服务器放置在子网19
如图12-1所示某单位通过2M的DDN专线接入广域网该单位内网分为三个子网服务器放置在子网19
如图所示某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.1
如图所示某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.1
如图12-1所示某单位通过2M的DDN专线接入广域网该单位内网分为三个子网服务器放置在子网19
如图所示某单位通过2M的DDN专线接入广域网该单位的内网分为三个子网服务器放置在子网192.168
如图12-1所示某单位通过2M的DDN专线接入广域网该单位内网分为三个子网服务器放置在子网19
如图所示某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.1
阅读以下说明回答问题1至问题3 【说明】 如图5-1所示某单位通过2M的DDN专线接入
某单位通过2M的DDN专线接入广域网该单位内网共分为三个子网服务器放置在子网192.168.5
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DHCP客户端不能从DHCP服务器获得______
Serializationdelayand1delayarethetwocomponentsofnetworkdelaythatareimprovedbyincreasingbandwidth.Serializationdelayi.e.theamountoftimeittakestoputthe2onthewireandqueuingdelaydepthofthequeueareimprovedbyincreasingthe3froma128KbpscircuittoaT1.Howeverthreeothercomponentsofdelayrouting/switchingdelaydistancedelayandprotocoldelayarecomponentsthatcannotbepositivelyaffectedbyan4inbandwidth.Ifthecircuitsarenotover-utilizedthenincreasingthebandwidthtoimprovethe5oftheapplicationwillonlyresultinanincreasedbandwidthwithnopositiveeffectsonperformance. 4是
在Windows中tracert命令的-h选项表示______
Theusualwaytoensurereliabledeliveryistoprovidethe16withsomefeedbackaboutwhatishappeningattheotherendoftheline.Typicallytheprotocolcallsforthereceivertosendbackspecial17framebearingpositiveornegative18abouttheincomingframes.Ifthesenderreceivesapositiveacknowledgementaboutaframeitknowstheframehasarrivedsafely.Ontheotherhandanegativeacknowledgementmeansthatsomethinghasgonewrongandtheframemustbetransmittedagain.Anadditionalcomplicationcomesfromthepossibilitythathardwaretroublesmaycauseaframeto19completely.Inthiscasethereceiverwillnotreactatallsinceithasnoanyreasontoreact.Itshouldbeclearthataprotocolinwhichthesendertransmitsaframeandthenwaitsforanacknowledgementpositiveornegativewillhangforeverifaframeiseverlostduetoforexample20hardware. 18是
OriginallyintroducedbyNetscapeCommunications56areageneralmechanismwhichHTTPServersideapplicationssuchasCGI57canusetobothstoreandretrieveinformationontheHTTP58sideoftheconnection.BasicallyCookiescanbeusedtocompensateforthe59natureofHTTP.Theadditionofasimplepersistentclient-sidestatesignificantlyextendsthecapabilitiesofWWW-based60. 59是
Themetricassignedtoeachnetworkdependsonthetypeofprotocol.SomesimpleprotocollikeRIPtreatseachnetworkasequals.The91ofpassingthrougheachnetworkisthesame;itisone92count.Soifapacketpassesthrough10networktoreachthedestinationthetotalcostis10hopcounts.OtherprotocolssuchasOSPFallowtheadministratortoassignacostforpassingthroughanetworkbasedonthetypeofservicerequired.A93throughanetworkcanhavedifferentcostsmetrics.Forexampleifmaximum94isthedesiredtypeofserviceasatellitelinkhasalowermetricthanafiber-opticline.Ontheotherhandifminimum95isthedesiredtypeofserviceafiber-opticlinehasalowermetricthanasatelliteline.OSPFalloweachroutertohaveseveralroutingtablebasedontherequiredtypeofservice. 93是
MIDIenablespeopletouse51computersandelectronicmusicalinstruments.ThereareactuallythreecomponentstoMIDIthecommunications"52"theHardwareInterfaceandadistribution53called"StandardMIDIFiles".InthecontextoftheWWWthemostinterestingcomponentisthe54Format.InprincipleMIDIfilescontainsequencesofMIDIProtocolmessages.HoweverwhenMIDIProtocol55arestoredinMIDIfilestheeventsarealsotime-stampedforplaybackinthepropersequence.MusicdeliveredbyMIDIfilesisthemostcommonuseofMIDItoday. 52是
Serializationdelayand1delayarethetwocomponentsofnetworkdelaythatareimprovedbyincreasingbandwidth.Serializationdelayi.e.theamountoftimeittakestoputthe2onthewireandqueuingdelaydepthofthequeueareimprovedbyincreasingthe3froma128KbpscircuittoaT1.Howeverthreeothercomponentsofdelayrouting/switchingdelaydistancedelayandprotocoldelayarecomponentsthatcannotbepositivelyaffectedbyan4inbandwidth.Ifthecircuitsarenotover-utilizedthenincreasingthebandwidthtoimprovethe5oftheapplicationwillonlyresultinanincreasedbandwidthwithnopositiveeffectsonperformance. 2是
WebSQLisaSQL-like61languageforextractinginformationfromtheweb.Itscapabilitiesforperformingnavigationofweb62makeitausefultoolforautomatingseveralweb-relatedtasksthatrequirethesystematicprocessingofeitherallthelinksina63allthepagesthatcanbereachedfromagivenURLthrough.64thatmatchapatternoracombinationofboth.WebSQLalsoprovidestransparentaccesstoindexserversthatcanbequeriedviatheCommon65Interface. 61是
VirtualizationisanapproachtoITthatpoolsandshares71sothatutilizationisoptimizedandsuppliesautomaticallymeetdemand.TraditionalITenvironmentsareoftensiloswherebothtechnologyandhuman72arealignedaroundanapplicationorbusinessfunction.Withavirtualized73peopleprocessesandtechnologyarefocusedonmeetingservicelevels74isallocateddynamicallyresourcesareoptimizedandtheentireinfrastructureissimplifiedandflexible.Weofferabroadspectrumofvirtualization75thatallowscustomerstochoosethemostappropriatepathandoptimizationfocusfortheirITinfrastructureresources. 72是
MIDIenablespeopletouse51computersandelectronicmusicalinstruments.ThereareactuallythreecomponentstoMIDIthecommunications"52"theHardwareInterfaceandadistribution53called"StandardMIDIFiles".InthecontextoftheWWWthemostinterestingcomponentisthe54Format.InprincipleMIDIfilescontainsequencesofMIDIProtocolmessages.HoweverwhenMIDIProtocol55arestoredinMIDIfilestheeventsarealsotime-stampedforplaybackinthepropersequence.MusicdeliveredbyMIDIfilesisthemostcommonuseofMIDItoday. 54是
Themetricassignedtoeachnetworkdependsonthetypeofprotocol.SomesimpleprotocollikeRIPtreatseachnetworkasequals.The91ofpassingthrougheachnetworkisthesame;itisone92count.Soifapacketpassesthrough10networktoreachthedestinationthetotalcostis10hopcounts.OtherprotocolssuchasOSPFallowtheadministratortoassignacostforpassingthroughanetworkbasedonthetypeofservicerequired.A93throughanetworkcanhavedifferentcostsmetrics.Forexampleifmaximum94isthedesiredtypeofserviceasatellitelinkhasalowermetricthanafiber-opticline.Ontheotherhandifminimum95isthedesiredtypeofserviceafiber-opticlinehasalowermetricthanasatelliteline.OSPFalloweachroutertohaveseveralroutingtablebasedontherequiredtypeofservice. 91是
Linux操作系统中网络管理员可以通过修改______文件对Web服务器端口进行配置
Thepurposeoftherequirementsdefinitionphaseistoproduceaclearcompleteconsistentandtestable36ofthetechnicalrequirementsforthesoftwareproduct. Duringtherequirementsdefinitionphasetherequirementsdefinitionteamusesaniterativeprocesstoexpandabroadstatementofthesystemrequirementsintoacompleteanddetailedspecificationofeachfunctionthatthesoftwaremustperformandeach37thatitmustmeet.Thestartingpointisusuallyasetofhigh-levelrequirementsfromthe38thatdescribetheprojectorproblem. Ineithercasetherequirementsdefinitionteamformulatesanoverallconceptforthesystemandthendefines39showinghowthesystemwillbeoperatedpublishesthesystemandoperationsconceptdocumentandconductsasystemconceptreviewSCR. FollowingtheSCRtheteamderives40requirementsforthesystemfromthehighlevelrequirementsandthesystemandoperationsconcept.Usingstructuredorobject-orientedanalysistheteamspecifiesthesoftwarefunctionsandalgorithmsneededtosatisfyeachdetailedrequirement. 40是
Thepurposeoftherequirementsdefinitionphaseistoproduceaclearcompleteconsistentandtestable36ofthetechnicalrequirementsforthesoftwareproduct. Duringtherequirementsdefinitionphasetherequirementsdefinitionteamusesaniterativeprocesstoexpandabroadstatementofthesystemrequirementsintoacompleteanddetailedspecificationofeachfunctionthatthesoftwaremustperformandeach37thatitmustmeet.Thestartingpointisusuallyasetofhigh-levelrequirementsfromthe38thatdescribetheprojectorproblem. Ineithercasetherequirementsdefinitionteamformulatesanoverallconceptforthesystemandthendefines39showinghowthesystemwillbeoperatedpublishesthesystemandoperationsconceptdocumentandconductsasystemconceptreviewSCR. FollowingtheSCRtheteamderives40requirementsforthesystemfromthehighlevelrequirementsandthesystemandoperationsconcept.Usingstructuredorobject-orientedanalysistheteamspecifiesthesoftwarefunctionsandalgorithmsneededtosatisfyeachdetailedrequirement. 36是
Theusualwaytoensurereliabledeliveryistoprovidethe16withsomefeedbackaboutwhatishappeningattheotherendoftheline.Typicallytheprotocolcallsforthereceivertosendbackspecial17framebearingpositiveornegative18abouttheincomingframes.Ifthesenderreceivesapositiveacknowledgementaboutaframeitknowstheframehasarrivedsafely.Ontheotherhandanegativeacknowledgementmeansthatsomethinghasgonewrongandtheframemustbetransmittedagain.Anadditionalcomplicationcomesfromthepossibilitythathardwaretroublesmaycauseaframeto19completely.Inthiscasethereceiverwillnotreactatallsinceithasnoanyreasontoreact.Itshouldbeclearthataprotocolinwhichthesendertransmitsaframeandthenwaitsforanacknowledgementpositiveornegativewillhangforeverifaframeiseverlostduetoforexample20hardware. 16是
Thepurposeoftherequirementsdefinitionphaseistoproduceaclearcompleteconsistentandtestable36ofthetechnicalrequirementsforthesoftwareproduct. Duringtherequirementsdefinitionphasetherequirementsdefinitionteamusesaniterativeprocesstoexpandabroadstatementofthesystemrequirementsintoacompleteanddetailedspecificationofeachfunctionthatthesoftwaremustperformandeach37thatitmustmeet.Thestartingpointisusuallyasetofhigh-levelrequirementsfromthe38thatdescribetheprojectorproblem. Ineithercasetherequirementsdefinitionteamformulatesanoverallconceptforthesystemandthendefines39showinghowthesystemwillbeoperatedpublishesthesystemandoperationsconceptdocumentandconductsasystemconceptreviewSCR. FollowingtheSCRtheteamderives40requirementsforthesystemfromthehighlevelrequirementsandthesystemandoperationsconcept.Usingstructuredorobject-orientedanalysistheteamspecifiesthesoftwarefunctionsandalgorithmsneededtosatisfyeachdetailedrequirement. 38是
Networkscanbeinterconnectedbydifferentdevices.Inthephysicallayernetworkscanbeconnectedby.31orhubswhichjustmovethebitsfromonenetworktoanidenticalnetwork.Onelayerupwefindbridgesandswitcheswhichoperateatdatalinklayer.Theycanaccept32examinetheMACaddressandforwardtheframestoadifferentnetworkwhiledoingminorprotocoltranslationintheprocess.Inthenetworklayerwehaveroutersthatcanconnecttwonetworks.Iftwonetworkshave33networklayertheroutermaybeabletotranslatebetweenthepacketformats.Inthetransportlayerwefindtransportgatewaywhichcaninterfacebetweentwotransportconnections.Finallyintheapplicationlayerapplicationgatewaystranslatemessage34.AsanexamplegatewaysbetweenInternetE-mailandX.400e-mailmust35thee-mailmessageandchangevariousheaderfields. 31是
WLANsareincreasinglypopularbecausetheyenablecost-effectiveconnectionsamongpeopleandapplicationsthatwerenotpossibleinthepast.ForexampleWLAN-basedapplicationscanenablefine-grainedmanagementofsupply11toimprovetheirefficiencyandreduce12.WLANscanalsoenableentirelynewbusinessprocesses.TocitebutoneexamplehospitalsareusingWLAN-enabledpoint-of-care13toreduceerrorsandimproveoverallpatientcare.WLANmanagementsolutionsprovideavarietyofotherbenefitsthatcanbesubstantialbutdifficulttomeasure.Forexampletheycanprotectcorporatedatabypreventing14throughrogueaccesspoints.Theycanimproveoverallnetworkmanagementbyintegratingwithcustomers’existingsystems.Fortunatelyitisn’tnecessarytomeasurethesebenefitstojustifyinvestinginWLANmanagementsolutionswhichcanquicklypayforthemselvessimplybyminimizingtime-15deploymentandadministrativechores. 12是
OriginallyintroducedbyNetscapeCommunications56areageneralmechanismwhichHTTPServersideapplicationssuchasCGI57canusetobothstoreandretrieveinformationontheHTTP58sideoftheconnection.BasicallyCookiescanbeusedtocompensateforthe59natureofHTTP.Theadditionofasimplepersistentclient-sidestatesignificantlyextendsthecapabilitiesofWWW-based60. 57是
VirtualizationisanapproachtoITthatpoolsandshares71sothatutilizationisoptimizedandsuppliesautomaticallymeetdemand.TraditionalITenvironmentsareoftensiloswherebothtechnologyandhuman72arealignedaroundanapplicationorbusinessfunction.Withavirtualized73peopleprocessesandtechnologyarefocusedonmeetingservicelevels74isallocateddynamicallyresourcesareoptimizedandtheentireinfrastructureissimplifiedandflexible.Weofferabroadspectrumofvirtualization75thatallowscustomerstochoosethemostappropriatepathandoptimizationfocusfortheirITinfrastructureresources. 74是
WebSQLisaSQL-like61languageforextractinginformationfromtheweb.Itscapabilitiesforperformingnavigationofweb62makeitausefultoolforautomatingseveralweb-relatedtasksthatrequirethesystematicprocessingofeitherallthelinksina63allthepagesthatcanbereachedfromagivenURLthrough.64thatmatchapatternoracombinationofboth.WebSQLalsoprovidestransparentaccesstoindexserversthatcanbequeriedviatheCommon65Interface. 65是
Networkscanbeinterconnectedbydifferentdevices.Inthephysicallayernetworkscanbeconnectedby.31orhubswhichjustmovethebitsfromonenetworktoanidenticalnetwork.Onelayerupwefindbridgesandswitcheswhichoperateatdatalinklayer.Theycanaccept32examinetheMACaddressandforwardtheframestoadifferentnetworkwhiledoingminorprotocoltranslationintheprocess.Inthenetworklayerwehaveroutersthatcanconnecttwonetworks.Iftwonetworkshave33networklayertheroutermaybeabletotranslatebetweenthepacketformats.Inthetransportlayerwefindtransportgatewaywhichcaninterfacebetweentwotransportconnections.Finallyintheapplicationlayerapplicationgatewaystranslatemessage34.AsanexamplegatewaysbetweenInternetE-mailandX.400e-mailmust35thee-mailmessageandchangevariousheaderfields. 33是
WLANsareincreasinglypopularbecausetheyenablecost-effectiveconnectionsamongpeopleandapplicationsthatwerenotpossibleinthepast.ForexampleWLAN-basedapplicationscanenablefine-grainedmanagementofsupply11toimprovetheirefficiencyandreduce12.WLANscanalsoenableentirelynewbusinessprocesses.TocitebutoneexamplehospitalsareusingWLAN-enabledpoint-of-care13toreduceerrorsandimproveoverallpatientcare.WLANmanagementsolutionsprovideavarietyofotherbenefitsthatcanbesubstantialbutdifficulttomeasure.Forexampletheycanprotectcorporatedatabypreventing14throughrogueaccesspoints.Theycanimproveoverallnetworkmanagementbyintegratingwithcustomers’existingsystems.Fortunatelyitisn’tnecessarytomeasurethesebenefitstojustifyinvestinginWLANmanagementsolutionswhichcanquicklypayforthemselvessimplybyminimizingtime-15deploymentandadministrativechores. 14是
DHCP协议的功能是23在Linux中提供DHCP服务的程序是24DHCP服务将主机的MAC地址和IP地址绑定在一起的方法是在25文件中添加host主机名hardwareEthernetxx.xx.xx.xx.xx.xxfixed-address192.168.0.91配置项创建DHCP租用文件的命令是26通过运行27命令可以设置在操作系统启动时自动运行DHCP服务
Theusualwaytoensurereliabledeliveryistoprovidethe16withsomefeedbackaboutwhatishappeningattheotherendoftheline.Typicallytheprotocolcallsforthereceivertosendbackspecial17framebearingpositiveornegative18abouttheincomingframes.Ifthesenderreceivesapositiveacknowledgementaboutaframeitknowstheframehasarrivedsafely.Ontheotherhandanegativeacknowledgementmeansthatsomethinghasgonewrongandtheframemustbetransmittedagain.Anadditionalcomplicationcomesfromthepossibilitythathardwaretroublesmaycauseaframeto19completely.Inthiscasethereceiverwillnotreactatallsinceithasnoanyreasontoreact.Itshouldbeclearthataprotocolinwhichthesendertransmitsaframeandthenwaitsforanacknowledgementpositiveornegativewillhangforeverifaframeiseverlostduetoforexample20hardware. 20是
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Themetricassignedtoeachnetworkdependsonthetypeofprotocol.SomesimpleprotocollikeRIPtreatseachnetworkasequals.The91ofpassingthrougheachnetworkisthesame;itisone92count.Soifapacketpassesthrough10networktoreachthedestinationthetotalcostis10hopcounts.OtherprotocolssuchasOSPFallowtheadministratortoassignacostforpassingthroughanetworkbasedonthetypeofservicerequired.A93throughanetworkcanhavedifferentcostsmetrics.Forexampleifmaximum94isthedesiredtypeofserviceasatellitelinkhasalowermetricthanafiber-opticline.Ontheotherhandifminimum95isthedesiredtypeofserviceafiber-opticlinehasalowermetricthanasatelliteline.OSPFalloweachroutertohaveseveralroutingtablebasedontherequiredtypeofservice. 95是
Networkscanbeinterconnectedbydifferentdevices.Inthephysicallayernetworkscanbeconnectedby.31orhubswhichjustmovethebitsfromonenetworktoanidenticalnetwork.Onelayerupwefindbridgesandswitcheswhichoperateatdatalinklayer.Theycanaccept32examinetheMACaddressandforwardtheframestoadifferentnetworkwhiledoingminorprotocoltranslationintheprocess.Inthenetworklayerwehaveroutersthatcanconnecttwonetworks.Iftwonetworkshave33networklayertheroutermaybeabletotranslatebetweenthepacketformats.Inthetransportlayerwefindtransportgatewaywhichcaninterfacebetweentwotransportconnections.Finallyintheapplicationlayerapplicationgatewaystranslatemessage34.AsanexamplegatewaysbetweenInternetE-mailandX.400e-mailmust35thee-mailmessageandchangevariousheaderfields. 35是
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