其他 - ＩＴ认证 - 查题吧

单选题

根据材料回答下面的题目：{Page}Border Gateway Protocol (BGP)is inter-autonomous system _(71 )protocol. BGP is based on a routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomous system routing because there are occasions on which the route .with the smallest(72)count is not the preferred route. For example, we may not want a packet through an autonomous system that is not secure even though it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce only the number of hop counts to the destination without defining the path that leads to that__(73)_. A router that receives a distance vector advertisement packet may be fooled if the shortest path is actually calculated through the receiving router itself. Link(74)routing is also not a good candidate for inner-autonomous system routing because an internet is usually too big for this routing method. To use link state routing for the whole internet would require each router to have a huge link state database. It would also take a long time for each router to calculate its routing(75)__using the Dijkstra algorithm.{Page}A．routingB．switchingC．transmittingD．receiving

A. table
B. state
C. metric
D. cost

单选题

根据材料回答下面的题目：{Page}Border Gateway Protocol (BGP)is inter-autonomous system _(71 )protocol. BGP is based on a routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomous system routing because there are occasions on which the route .with the smallest(72)count is not the preferred route. For example, we may not want a packet through an autonomous system that is not secure even though it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce only the number of hop counts to the destination without defining the path that leads to that__(73)_. A router that receives a distance vector advertisement packet may be fooled if the shortest path is actually calculated through the receiving router itself. Link(74)routing is also not a good candidate for inner-autonomous system routing because an internet is usually too big for this routing method. To use link state routing for the whole internet would require each router to have a huge link state database. It would also take a long time for each router to calculate its routing(75)__using the Dijkstra algorithm.{Page}A．routingB．switchingC．transmittingD．receiving

A. status
B. search
C. state
D. research

单选题

根据材料回答下面的题目：{Page}Border Gateway Protocol (BGP)is inter-autonomous system _(71 )protocol. BGP is based on a routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomous system routing because there are occasions on which the route .with the smallest(72)count is not the preferred route. For example, we may not want a packet through an autonomous system that is not secure even though it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce only the number of hop counts to the destination without defining the path that leads to that__(73)_. A router that receives a distance vector advertisement packet may be fooled if the shortest path is actually calculated through the receiving router itself. Link(74)routing is also not a good candidate for inner-autonomous system routing because an internet is usually too big for this routing method. To use link state routing for the whole internet would require each router to have a huge link state database. It would also take a long time for each router to calculate its routing(75)__using the Dijkstra algorithm.{Page}A．routingB．switchingC．transmittingD．receiving

A. connection
B. window
C. source
D. destination

单选题

为实现图像信息的压缩，建立了若干种国际标准。其中，既是DVD的标准，也是高清晰度电视(HDTV)的标准是 (9) 。

A. MPE1
B. MPE2
C. MPE4
D. MPE7

单选题

CORBA是由0MG组织为解决分布式处理环境中软硬件系统互连而提出的一种解决方案，已经逐渐成为分布计算技术的标准。CORBA标准主要分为三个层次，其中规定业务对象有效协作所需的协议规则的层次是(29)。

A. 对象请求代理
B. 公共对象服务
C. 公共语言规范
D. 公共设施

单选题

ADSL、HFC是用户经常采用的Intemet接入方式，以下相关叙述中，正确的是(18)

ADSL接入数据传输时使用TDM方式共享传输介质，而HFC接入数据传输时使用WDM方式共享传输介质
B. ADSL接入上行、下行通道采用非对称型的数据传输方式，而HFC接入上行、下行通道采用对称型的数据传输方式
C. ADSL接入采用QADMT等信号编码方式，而HFC接入采用QPSQAM等信号编码方式
D. 在用户端与局端之间，ADSHFC信号传输都采用共享广播方式，数据易被捕获及分析，安全性较低

单选题

IPv6地址自动配置可以分为有状态和无状态两种方式。以下描述中，正确的是(56)。

A. 无状态地址自动配置所生成的地址由64位前缀和64位EU64接口ID组成
B. 无状态配置需要DHCPv6支持，有状态配置不需要DHCPv6支持
C. 有状态地址自动配置要求本地链路支持组播，且网卡要能收发组播包
D. 在默认状态下，IPv6路由器的地址是自动配置的

单选题

组播协议的关键问题之一就是如何建立一棵适应应用需求的组播树。 (23) 协议使用了反向路径组播机制来构建组播树。

A. PIDM
B. PISM
C. MOSPF
DVMRP

单选题

在无盘工作站应用环境中，使用①协议确定本机的IP地址。该协议工作过程中，其请求包被封装在②中以③方式传输。此处，①、②、③处应分别填入(20)。

AR以太帧、广播
B. RARIP数据报、广播
C. RAR以太帧、单播
D. ARIP数据报、单播

单选题

以下关于活动资源估算的描述中，错误的是（）。

A. 活动资源估算要确定实施项目活动所需资源的使用时间
B. 活动资源估算过程必须和成本估算过程相结合
C. 进行活动排序时需要考虑活动资源估算问题
D. 企业基础设施资源信息可以用于活动资源估算

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