Which of the following describes the appropriate port assignment and message exchange in a standard TFTP transaction？（）

单项选择题Youaredeployingtwocoreswitches，oneineachbuilding，50kmawayfromeachother.Thecross-connectionbetweenthemwillbeaLayer22-gigabitEtherChannelwithan802.1Qtrunk.Youconfigureditcorrectlybutthelinkdoesnotcomeup.Theportisinthe adminup state，andthelineprotocolisinthe down state.ThefiberlinkisOK.Whatwouldbethemostlikelyreasonforthelinknottocomeup？（）

A.The switches are not the same model.
B.You are not using the correct SFP.
C.You are not using correct optical media converters.
D.Configuration should be modified， because the distance is longer.

单项选择题CustomerXhasahub-and-spokeFrameRelaynetwork，withacentralofficeandtwobranchoffices（RemoteAandRemoteB）.EachlocationhasonlyonephysicallinktotheFrameRelaycloudandRemoteBhasarouterthatisnotaCiscorouter.Sincetheinstallation，thereisnoconnectivitybetweenRemoteBandthecentraloffice.Whatisapossiblesolutiontothisissue？（）

A.Because Frame Relay IETF encapsulation is only configurable at interface level， you must use IETF encapsulation on all routers.
B.This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.
C.The router at RemoteB must be replaced by a Cisco router.
D.Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.
E.There is a problem in the Frame Relay cloud， because Cisco routers are compatible with IETF Frame Relay.

单项选择题Whatisanimportantconsiderationthatshouldbetakenintoaccountwhenconfiguringshapedroundrobin？（）

A.It enables policing.
B.Strict priority is not supported.
C.WRED must be previously enabled.
D.It enables WRR

多项选择题ThenetworkadministratorwantstoenableanEtherChannelbetweentwoswitchesin on mode.Theadministratorconnectsthecablesandenablestheinterfaces，butwhileconfiguringtheEtherChannelinthefirstswitch，aspanning-treeloopwasdetected.Whichtwooftheseprocedurescanavoidthisproblem？（）

A.Configure the EtherChannel as "desirable" first.
B.Assign all interfaces to the same VLAN.
C.Disable PortFast on the interfaces in the EtherChannels.
D.Disable all interfaces first.
E.Fast Ethernet and Gigabit Ethernet ports cannot be assigned to the same EtherChannel.
F.Fix cabling problems.

单项选择题Refer to the exhibit. Based on this configuration， what type of marker is achieved？（）

A.Single-rate， two-color marker
B.Three-rate， two-color marker
C.Two-rate， three-color marker
D.Single-rate， three-color marker