● NAC’s（Network Access Control） role is to restrict network access to only compliant endpoints and （66） users. However, NAC is not a complete LAN （67） solution; additional proactive and （68） security measures must be implemented. Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 10Gbps, ensuring a high level of security plus application availability and performance. Nevis integrates NAC as the first line of LAN security （69） . In addition to NAC, enterprises need to implement role-based network access control as well as critical proactive security measures— real-time, multilevel （70）inspection and microsecond threat containment.

试卷相关题目

• 1● 路由器收到一个数据包，其目标地址为 195.26.17.4，该地址属于 （65）子网。

  A.195.26.0.0/21

  B.195.26.16.0/20

  C.195.26.8.0/22

  D.195.26.20.0/22

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• 2● 设有两个子网 202.118.133.0/24 和 202.118.130.0/24，如果进行路由汇聚，得到的网 络地址是 （64） 。

  A.202.118.128.0/21

  B.202.118.128.0/22

  C.202.118.130.0/22

  D.202.118.132.0/20

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• 3● 802.11 标准定义的分布式协调功能采用了 （63） 协议。

  A.CSMA/CD

  B.CSMA/CA

  C.CDMA/CD

  D.CDMA/CA

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• 4● ARP 协 议的 作 用 是 （61） ，ARP 报文封装在 （62） 中传送。

  A.由 IP 地址查找对应的 MAC 地址

  B.由 MAC 地址查找对应的 IP 地址

  C.由 IP 地址查找对应的端口号

  D.由 MAC 地址查找对应的端口号

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• 5● 对于具有 n 个元素的一个数据序列，若只需得到其中第 k 个元素之前的部分排序， 最好采用 （59） ，使用分治（Divide and Conquer）策略的是 （60） 算法。

  A.希尔排序

  B.直接插入排序

  C.快速排序

  D.堆排序

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• 6● Virtualization is an approach to IT that pools and shares （71） so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human （72）are aligned around an application or business function. With a virtualized （73） , people, processes, and technology are focused on meeting service levels, （ 74 ） is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization （75） that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

  A.advantages

  B.resources

  C.benefits

  D.precedents

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