计算机网络应用基础(2) LT " " "第11题从系统工程的角度,要求计算机信息网络具有" " " "A、可用性、完整性、保密性" " " "B、真实性(不可抵赖性) " "C、可靠性、可控性" " " "D、稳定性" " " "第12题实施计算机信息系统安全保护的措施包括: " "A、安全法规" " " "B、安全管理" " " "C、安全技术" " " "D、安全培训" " " "第13题OSI层的安全技术来考虑安全模型" " " "A、物理层" " " "B、数据链路层" " " "C、网络层、传输层、会话层" " " "D、表示层、应用层" " " "第14题网络中所采用的安全机制主要有: " "A、区域防护" " " "B、加密和隐蔽机制;认证和身份鉴别机制;审计;完整性保护" " " "C、权力控制和存取控制;业务填充;路由控制" " " "D、公证机制;冗余和备份" " " "第15题公开密钥基础设施(PKl)由以下部分组成: " "A、认证中心;登记中心" " " "B、质检中心" " " "C、咨询服务" " " "D、证书持有者;用户;证书库" " " "第16题网络安全应具有的特征包括" " " "A、保密性" " " "B、完整性" " " "C、可用性" " " "D、可控性" " "
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