单项选择题 Refer to the exhibit. You are setting up a 2-gigabit EtherChannel. Following IEEE standards, the exhibit shows your configuration in a local switch1. However, EtherChannel is not coming up. Which one of these statements could be a possible reason?（）

问答题 BGP选路的最优先参数是什么？

多项选择题 WhichtwoprotocolscanhavetheirheaderscompressedthroughMQC？（）