VLAN主要有四种划分方式，分别为（） ["基于端口的VLAN","基于MAC地址的VLAN","基于协议的VLAN","基于子网的VLAN","基于物理地址划分的VLAN"]
《铁路路风管理办法》规定，贩运物品一次价值（）以上，可定为路风事件。 ["1000","2000","3000","4000"]
智能型政府。
体育之所以是一种文化是因为：（） ["体育是人类也只有人类才能创造出来的一种社会活动","体育是人类也只有人类才能创造出来的一种精神活动","体育具备文化的各种特征","体育运动具有内在的价值观念、意识形态和行为规范等"]
You are deploying two core switches， one in each building， 50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state， and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？ （） [" The switches are not the same model"," You are not using the correct SFP"," You are not using correct optical media converters"," Configuration should be modified， because the distance is longer"]
抑郁
