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 " " " " " " " " " " " "第17题 能够达到C2级的常见操作系统有 " " " " " "A、Unix操作系统 " " " " " "B、Windows NT操作系统 " " " " " "C、Windows 98操作系统 " " " " " "D、DOS操作系统 " " " " " " " " " " " "第18题 对一个系统进行访问控制的方法有 " " " " " "A、访问卡 " " " " " "B、合法的用户名 " " " " " "C、设置口令 " " " " " "D、指纹验证 " " " " " " " " " " " "第19题 关于Windows " "NT系统的强制性登录和使用Ctrl+Alt+Del组合键启动登录过程的叙述中， " "正确的是 " " " " " "A、这种强制性登录过程不能关闭 " " " " " "B、这种强制性登录过程能够被关闭 " " " " " "C、使用组合键会造成入侵者的假登录界面被终止，从而阻止这种欺骗行为" "产生 " " " " " "D、使用组合键可以启动登录程序，但不能阻止假登录程序的运行 " " " " " " " " " " " "第20题 以下选择安全口令的方式，合理的是 " " " " " "A、选择尽可能长的口令 " " " " " "B、选择熟悉的英语单词 " " " " " "C、访问多个系统时，使用相同的口令 " " " " " "D、选择英文字母和数字的组合 " " " " " " " " " " " "第21题 以下关于摘要函数的描述，正确的是 " " " " " "A、摘要函数的输入可以是任意大小的消息 " " " " " "B、摘要函数的输入是固定长度的消息 " " " " " "C、MD4客户机不能和MD5服务器交互 " " " " " "D、MD4客户机能够和MD5服务器交互 " " " " " " " " " " " "第22题 密码学的作用包括 " " " " " "A、提供机密性 " " " " " "B、鉴别 " " " " " "C、完整性 " " " " " "D、抗抵赖 " " " " " " " " " " " "第23题 公钥密码系统可用于以下哪些方面 " " " " " "A、通信保密 " " " " " "B、数字签名 " " " " " "C、防止信息被改动 " " " " " "D、密钥交换 " " " " " " " " " " " "第24题 数字签名 " " " " " "A、不可伪造 " " " " " "B、可以抵赖 " " " " " "C、可以重用 " " " " " "D、可以确认来源 " " " " " " " " " " " "第25题 包过滤系统不能识别的信息
