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网络工程师每日一练试题内容（2022/1/31）

试题1：

Border Gateway Protocol(BGP) is inter-autonomous system  (1)  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  (2)  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  (3)  . 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  (4)  routing is also not a good candidate for inter-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  (5)  using the Dijkstra algorism.
（1）A、routing
B、switching
C、transmitting
D、receiving
（2）A、path
B、hop
C、route
D、packet
（3）A、connection
B、window
C、source
D、destination
（4）A、status
B、search
C、state
D、research
（5）A、table
B、state
C、metric
D、cost

试题解析与讨论：www.cnitpm.com/st/92253176.html
试题参考答案：A、B、D、C、A

试题2：

以下域名服务器中，没有域名数据库的  （ ）  。
A、缓存域名服务器
B、主域名服务器
C、辅助域名服务器
D、转发域名服务器

试题解析与讨论：www.cnitpm.com/st/90643121.html
试题参考答案：A

试题3：

可以用数字信号对模拟载波的不同参量时行调制，下图所示的调制方式称为（ ）

A、ASK
B、FSK
C、PSK
D、DPSK
试题解析与讨论：www.cnitpm.com/st/233437874.html
试题参考答案：C

试题4：

私网地址用于配置公司内部网络，下面选项中，  （ ）  属于私网地址。
A、128.168.10.1
B、10.128.10.1
C、127.10.0.1
D、172.15.0.1

试题解析与讨论：www.cnitpm.com/st/89133069.html
试题参考答案：B

试题5：  路由器的(   )接口通过光纤连接广城网。
A.SFP端口
B.同步串行口
C.Console 接口
D.AUX 端口
试题解析与讨论：www.cnitpm.com/st/404703532.html
试题参考答案：A

试题6：

渐增式开发方法有利于 （ ） 。
A、获取软件需求
B、快速开发软件
C、大型团队开发
D、商业软件开发

试题解析与讨论：www.cnitpm.com/st/85352939.html
试题参考答案：A

试题7：

DOM is a platform- and language- （1） API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents（currently, definitions for HTML and XML documents are part of the specification）. The document can be further processed and the results of that processing can be incorporated back into the presented  （2） . DOM is a  （3） -based AP1 to documents, which requires the whole document to be represented in  （4）  while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large （5） documents that do not fit into the memory available for processing.
（1）A、specific
B、neutral
C、contained
D、related
（2）A、text
B、image
C、page
D、graphic
（3）A、table
B、tree
C、control
D、event
（4）A、document
B、processor
C、disc
D、memory
（5）A、XML
B、HTML
C、script
D、Web

试题解析与讨论：www.cnitpm.com/st/84722917.html
试题参考答案：B、C、B、D、A

试题8：

如果子网172.6.32.0/20被划分为子网172.6.32.0/26，则下面的结论中正确的是( )。
A、被划分为62个子网
B、每个子网有64个主机地址
C、被划分为32个子网
D、每个子网有62个主机地址

试题解析与讨论：www.cnitpm.com/st/92673191.html
试题参考答案：D

试题9：  如果网络结点传输lobit数据需要1×10-8s，则该网络的数据传输速率为（　）
A.10Mbps
B.1Gbps
C.100Mbps
D.10Gbps
试题解析与讨论：www.cnitpm.com/st/315924670.html
试题参考答案：B

试题10： 为确保连接的可靠建立TCP采用的技术是（　）
A.4次重发
B.3次重发
C.4次握手
D.3次握手
试题解析与讨论：www.cnitpm.com/st/3161818239.html
试题参考答案：D