第19题:文中( 1 )处正确的答案是( )。
A.提供严格定义的文档
B.加快需求的确定
C.简化项目管理
D.加强用户参与和决策
[单选题]根据下面的文字资料回答 17~21 题 HTTP是WwW的核心,它是一个( 1 )协议,当访问一个URL为https://www.ccidedu.com.en/index.htm的网页时,浏览器首先向( 2 )请求解析https://www.ccidedu.com.cn的IP地址。获得解析后的IP地址后,浏览器通过( 3 )端口与服务器建立( 4 )连接。随后浏览器发送取文件命令( 5 )。服务器响应并将文件index.htm发送给浏览器,最后释放连接。第17题:文中( 1 )处正确的答案是(
[单选题]根据下面的文字资料回答 21~24 题 Internet是全球最大的、开放的、由众多网络互联而形成的计算机网络,狭义Internet是指由上述提到网络中采用IP协议的网络互联而成的,广义Internet是指狭义Internet加上所有( 1 )的网络。Internet体系结构具有良好扩充性的主要原因在于它( 2 )。广义Internet的这种基于单一主干核心结构的弊端在于( 3 )。这种结构将逐渐被( 4 )所取代。第21题:文中( 1 )处正确的答案是( )。A.采用应用网关互联B.能通过路由
[单选题]根据下面的文字资料回答 71~75 题 In the following essay,each blank has four choices.Choose the most suitable one from the four choices and write down in the answer sheet.A( 1 )is basically an end point of a communication link between two applications.Sockets that
[单选题]根据下面的文字资料回答 71~75 题 The purpose of the requirements definition phase is to produce a clear,complete,consistent,and testable( 1 )of the technical requirements for the software produet.D.uring the requirements definition phase,the requirements deftnifi
[单选题]根据下面的文字资料回答 71~75 题 connected by( 1 )or Hubs,which just move the bits from one network to an identical network. One layer up we find bridgas and swiehes,which operate at data link layer. They can accept ( 2 ) , examine the MAC address, and forward th
[单选题]根据下面的文字资料回答 71~75 题 In the following essay.each blank has four choices.Choose the best answer and write down on the answer sheet.Spread spectrum simply means that data is sent in( 1 )pieces over a number of the discrete frequencies available for use
[单选题]根据下面的文字资料回答 71~75 题In the following essay,each blank has fourchoices.Choose the best answer and write down on thean,swer sheet.Microwave communication uses( 1 )frequency radio waves that travel instraighdine sthroughthe air.Because the waves cannot(
[单选题]根据下面的文字资料回答 15~19 题 IEEE 802.11定义了无线局域网的两种工作模式,其中( 1 )模式是一种点对点连接的网络,不需要无线接入点和有线网络的支持,用无线网卡连接的设备之间可以直接进行通信。IEEE 802.11的物理层规定了三种传输技术,即红外技术、直接序列扩频(DSSS)和跳频扩频(FHSS)技术,后两种扩频技术都工作在( 2 )的ISM频段。IEEE 802.11MAC层具有多种功能,其中分布式协调功能采用的是( 3 )协议,用于支持突发式通信,而用于支持多媒体应用的
[单选题]根据下面的文字资料回答 71~75 题 n the following essay,each blank has four choices.Choose the most suitable one from the four choices and write down in the answer sheet.Open Shortest Path First(OSPF)is a( 1 )routing algorithm that( 2 )work done on the OSI IS-IS i
[单选题]根据下面的文字资料回答 63~67 题In low-speed network,it is usually adequate to wait for congestion to occur andthen react to it by telling the source of packets to slow down.In high-speednetworks,this approach oftenworks poorly,because in the( 1 )between sending