The growth of switching has(135)a new generation of network management tools that help(136)cope with the challenges,(137)them to correlate device alarms in order to(138)pinpoint root causes, or to monitor service levels without depending on IP subnet schemes. These new tools have become essential to coping with the primary(139)effect of any treatment that significantly increases network flexibility: added complexity.

单项选择题The relational database model requires the data be(110)through programs that don't rely on the position of the data in the database. This is in direct(111)to the other database mode, where the program has to follow a series of pointers to the data it seeks. A program(112)a relational database simply asks for the data it seeks; the DBMS performs the necessary searches and(113)the information. The(114)on how the search is done are specific to the DBMS and vary from product to product.

单项选择题下面哪种攻击属于主动攻击？ A．网络嗅探 B．邮件分析 C．流量分析 D．DDOS

单项选择题关于CMIP的描述中，正确的是： A．MIP是IEEE制定的 B．MIP主要采用trap机制 C．MIP结构复杂 D．MIP支持SNMP服务

单项选择题关于ADSL接入的描述中，正确的是： A．数据传输需要进行调制解调 B．传输介质采用同轴电缆 C．只支持TCP IP网络 D．上行速率通常大于下行速率

单项选择题以下哪种支付验证方式最安全?

单项选择题防止网上银行账户被盗的有效方式是：

单项选择题以下选项作为密码较合适的是()

单项选择题关于Windows Server 2008操作系统的描述中，错误的是： A．系统集成IIS服务 B．虚拟化采用Hypervisor软件层 C．系统体现了动态IT技术的趋势 D．采用基于模拟器的虚拟化技术

单项选择题关于交换式局域网的描述中，正确的是 A．采用共享介质 B．核心设备是交换机 C．只支持半双工通信 D．只支持1GpBs速率

单项选择题IEEE802.15标准针对的网络是 A．无线个人区域网 B．无线传感器网 C．无线宽带城域网 D．无线局域网