多项选择题 LoopguardandUniDirectionalLinkDetectionbothprotectagainstLayer2STPloops.InwhichtwowaysdoesloopguarddifferfromUDLDinloopdetectionandprevention？（）

问答题 what’s IOS command ， you can see the output as below

单项选择题 Refer to the exhibit. Catalyst R is the root bridge for both VLAN 1 and VLAN 2. What is the easiest way to load-share traffic across both trunks and maintain redundancy in case a link fails，without using any type of EtherChannel link-bundling？ （）