乘务人员乘务中私自占用旅客空间，属于（）问题。 红线。 A1。 A2。 B。
路由器工作在OSI模型中的（） 物理层；。 数据链路层；。 网络层；。 会话层。。
Refer to the exhibit. The Layer 2 network uses VTP to manage its VLAN database. A network designer created all VLANs on the VTP server （switch 1） and it has been advertised through VTP to all other VTP clients （switches 2 through 4）. Due to network growth， a network operator decided to add a new switch between switch 1 and switch 3. The network operator has been instructed to use a refurbished switch and use a VTP client. Which three of these factors should the network operator consider to minimize the impact of adding a new switch？（） Pay special attention to the VTP revision number， because the higher value takes the priority.。 Configure all VLANs manually on the new switch in order to avoid connectivity issues.。 A trunk should be established between the new switch and switches 1 and 3 as VTP only runs over trunk links.。 Set at least the VTP domain name and password to get the new switch synchronized.。 An ISL trunk should be established between the new switch and switches 1 and 3， because VTP only runs over ISL.。 Pay special attention to the VTP revision number， because the lower value takes the priority.。
学校形象策划是校园环境建设。
1850 TSS-5C设备支持的最大STM-1接口为 （） 2个。 1个。 3个。
消毒是指用（）的方法杀灭或消除环境中的致病微生物，达到无害化
