【多选题】
choose four___
A. DHCP snooping ——————————blocks DHCP messages
B. Dynamic ARP inspection——————verifies IP-to-MAC traffic on untrusted ports
C. IP sources guard ——————————provides layer 2 interface security with ports ACLs
D. Port security————————————mitigates MAC-address spoofing at the access interface
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答案
ABCD
解析
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choose four___
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D. It uses UDP port 49
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【多选题】
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安全生产是为了使生产过程在符合物质条件和工作程序下进行，防止发生人身死亡、财产损失等事故，采取的消除或控制危险和有害因素、保障人身安全和健康、设备和设施免遭损坏、环境免遭破坏的一系列措施和活动
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《建设工程安全生产管理条例》规定，安装、拆卸施工起重机械和整体提升脚手架、模板等自升式架设设施，应当编制拆装方案、制定安全施工措施，并由项目负责人现场监督
A. 对
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《建设工程安全生产管理条例》规定，检验检测机构对检测合格的施工起重机械和整体提升脚手架、模板等自升式架设设施，应当出具安全合格证明文件，并由施工单位对检测结果负责
A. 对
B. 错
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目标分解要做到横向到边，纵向到底。横向到边就是把安全总目标由上而下的一层一层分解，明确责任，使责任落实到人；纵向到底就是把施工单位的安全总目标分解到各个职能部门、科室
A. 对
B. 错
