单项选择题 NetworkAhasaspanning-treeprobleminwhichthetrafficisselectingalongerpath.Howisthepathcostcalculated？（）

单项选择题 Refer to the exhibit. Which switching feature is being tested?（）

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