单项选择题
A.It enables policing.
B.Strict priority is not supported.
C.WRED must be previously enabled.
D.It enables WRR
问答题 howmanyneighborcommandsrequiredforestablishibgppeersin4routers？
多项选择题 ThenetworkadministratorwantstoenableanEtherChannelbetweentwoswitchesin"on"mode.Theadministratorconnectsthecablesandenablestheinterfaces，butwhileconfiguringtheEtherChannelinthefirstswitch，aspanning-treeloopwasdetected.Whichtwooftheseprocedurescanavoidthisproblem？（）
单项选择题 Refer to the exhibit. Based on this configuration， what type of marker is achieved？（）