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2023数据库系统工程师真题参考答案火热出炉
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  3. 2011年05月网络工程师考试上午真题【基础知识】
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2011年05月网络工程师考试上午真题【基础知识】

【69】在网络设计阶段进行通信流量分析时可以采用简单的80/20规则，下面关于这种规则的说明中，正确的是（69）。

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【70】根据用户需求选择正确的网络技术是保证网络建设成功的关键，在选择网络技术时应考虑多种因素，下面的各种考虑中，不正确的是（70）。

真题详情及解析

【71-75】Border Gateway Protocol（BGP） is inter-autonomous system （71） protocol. BGP isbasedonarouting method called path vector routing. Distance vector routing is not a good candidateforinter-autonomous system routing because there are occasions on which the route with thesmallest （72） count is not the preferred route. For example， we may not want a packetthroughan autonomous system that is not secure even though it is shortest route. Also， distance vectorroutingis unstable due to the fact that the routers announce only the number of hop counts to thedestinationwithout defining the path that leads to that （73） . A router that receives a distancevectoradvertisement packet may be fooled if the shortest path is actually calculated through thereceivingrouter itself. Link （74） routing is also not a good candidate for inter-autonomous systemroutingbecause an internet is usually too big for this routing method. To use link state routingforthewhole internet would require each router to have a huge link state database. It wouldalsotakealong time for each router to calculate its routing （75） using the Dijkstra algorism.

真题详情及解析
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