单选题SNMP定义为依赖 (64) 数据报服务的应用层协议。

单选题一个中等规模的公司，3个不同品牌的路由器都配置RIPv1协议。ISP为公司分配的地址块为201.113.210.0/24。公司希望通过VLSM技术把网络划分为3个子网，每个子网中有40台主机，下面的配置方案中最优的是______。

单选题试题(52)、(53) 有一种特殊的IP地址叫做自动专用IP地址(APIPA)，这种地址的用途是____(52)____，以下地址中属于自动专用IP地址的是____(53)____。

单选题某企业单位根据应用需求需要在会议室部署无线AP。为了保证只允许处于该会议室内的笔记本电脑接入此无线AP，规划师的解决方案最有可能是______。

单选题某无线局域网标准规定可使用2.4GHz频段。假定使用的下限频率为2.40GHz，则为了达到该标准所规定的300Mbps数据率，使用单信道条件下，其上限频率应不低于______GHz。 A．2.55 B．2.70 C．2.85 D．3.00

单选题以下关于集线器的分类，不正确的是 (43) 。

单选题TCP是一个面向连接的协议，它提供连接的功能是 (31) 的，采用 (32) 来实现可靠数据流的传送。为了提高效率，又引入了滑动窗口协议，协议规定重传 (33) 的分组，这种分组的数量最多可以 (34) ，TCP协议采用滑动窗口协议解决了 (35) 。

单选题现有四级指令流水线，分别完成取指、取作的时间依次为数、运算、传送结果四步操作。若完成上述操9ns、10ns、6ns、8ns。则流水线的操作周期应设计为 （ ） ns。

单选题ADSL 采用的两种接入方式是__（ ）__。

单选题RPC1757文件定义的RMON管理信息库是对M1B-2的扩充，其中的矩阵组存储的信息是 (40) 的通信情况。 A．两个子网之间 B．主机与子网之间 C．两个以太网之间 D．一对主机之间

单选题Networks can be interconnected by different devices. In the physical layer, networks can be connected by (66) or Hubs, which just move the bits from one network to an identical network. One layer up we find bridges and swiches, which operate at data link layer. They can accept (67) ,examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two netwoks. If two networks have (68) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between the two transport connections. Finally, in the application layer, application gateways translate message (69) . As an example, gateways between Internet e-mail and X. 400 e-mail must (70) the e-mail message and change various header fields.

单选题WindowsServer2003中的IIS为Web服务提供了许多选项，利用这些选项可以更好地配置Web服务的性能、行为和安全等。如下图所示属性对话框中，“限制网络带宽”选项属于(48)选项卡。A．HTTP头B．性能C．主目录D．文档

单选题SNMP管理站可以通过查询RMON主机组的______，从而快速找出某个接口上最新出现的主机。 A) 主机控制表 B) 主机数据表 C) 主机时间表 D) 主机矩阵表

单选题在Wi—Fi安全协议中，WPA与WEP相比，采用了____________。

单选题One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the (71) algorithm. Routingprotocols in internetworks differ slightly from the idealized graph model. In an internetwork, the goal ofthe routers to forward (72) to various networks. Routers running RIP send their advertisement abOLit cost every (73) seconds. A router also sends an up date message whenever an update from another router causes it to change its routing table. Routing protocols use different techniques for assigning (74) to individual networks. Further, each routing protocol forms a metric aggregation in a different way. RIP takes the simplestapproach, with all link costs being equal (75) . Thus it always tries to find the minimum hop route. Valid distances are 1 through 15. This also limits RIP to running on fairly small networks.

单选题按照同步光纤网传输标准(SONET),OC-1 的数据速率为（ ）Mb/s