You are implementing basic switch security best practices. Which of these is a tactic that you can use to mitigate compromises from being launched through the switch？（） ["Make all ports private VLAN ports.","Place all unused ports in native VLAN 1 until needed.","Proactively configure unused switch ports as access ports.","Disable Cisco Discovery Protocol globally."]
某工程需租用钢管，双方约定租凭期限为8个月，则下列关于该租凭合同的说法，错误的是（） ["应以书面方式订立","若以口头方式订立，则租凭期视为6个月","若以口头方式订立，出租人可随时解除合同","若以口头方式订立，承租人可随时解除合同"]
Which Frame Relay feature is responsible for transmitting keepalives to ensure that the PVC does not shut down because of inactivity?（） [" DLCI"," BECN"," FECN"," LMI"," CIR"," DE"]
党的十八大将“坚持维护社会公平正义”、“坚持走共同富裕道路”、“坚持促进社会和谐”纳入夺取中国特色社会主义新胜利的基本要求，将保障和（）作为社会建设的重点。
在企业形象的分类中，按企业形象的内容可划分为（） ["期望形象","真实形象","总体形象","实际形象","特殊形象"]
电烙印的形状对推断导体的（）有重要意义。
