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用看的、听的学真题
study by eyes and ears.
2023数据库系统工程师真题参考答案火热出炉
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网络工程师
2014年05月网络工程师考试上午真题【基础知识】
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2014年05月网络工程师考试上午真题【基础知识】
内容:基础知识
时间:150分钟
总分:75分
题数:75题
【64-65】OSPF协议将其管理的网络划分为不同类型的若干区域(Area),其中标准区域特点是
(64)
;存根区域(stub)的特点是
(65)
。
真题详情及解析
【66-67】NAT技术解决了IPv4地址短缺的问题,假设内网的地址数是m,而外网地址数n,若m>n,则这种技术叫做
(66)
,若m>n,且n=1,则这种技术这叫做
(67)
。
真题详情及解析
【68-69】CIDR技术解决了路由缩放问题,例如2048个C类网络组成一个地址块,网络号从192.24.0.0~192.31.255.0这样的超网号应为
(68)
,其地址掩码应为
(69)
。
真题详情及解析
【70】网络系统设计过程中,物理网络设计阶段的任务是
(70)
。
真题详情及解析
【71-75】The traditional way of allocating a single channel among multiple competing users is to chop up its
(71)
by using one of the multiplexing schemes such as FDM (frequency division multiplexing). if there are n users, the bandwidth is divided into n equal-sized portions,with each user being assigned one portion. since each user has a private frequency
(72)
, there is no interference among users.when there is only a small and constant number of users, each of which has a steady stream or a heavy load of
(73)
, this division is a simple and efficient allocation mechanism. a wireless example is FM radio stations. each station gets a portion of the FM band and uses it most of the time to broadcast its signal.however, when the number of senders is large and varying or the traffic is
(74)
, FDM presents some problems. if the spectrum is cut up into n regions while fewer than n users are currently interested in communicating, a large piece of valuable spectrum will be waste if more than n users want to communicate,some of them will be denied
(75)
for lack of bandwidth.
真题详情及解析
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