网络工程师作为软考中级科目，考试包括上午综合知识与下午案例分析两门，为帮助广大软考中级网络工程师考生更好备考，特整理汇总了网络工程师部分综合知识与案例分析试题、答案及解析供考生查阅，并提供免费在线模拟答题、历年试题免费下载等服务。
一、综合知识：
1、 在以下网络应用中，要求带宽最高的应用是 ( ) 。
A、可视电话
B、数字电视
C、拨号上网
D、收发邮件
参考答案：B
2、 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
参考答案：B、C、B、D、A
3、 melissa and loveletter made use of the trust that exists between friends or colleagues. imagine receiving an (1 ) from a friend who asks you to open it. this is what happens with melissa and several other similar email (2) . upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages (3) .
as administrators seek to block dangerous email attachments through the recognition of well-known (4) , virus writers use other extensions to circumvent such protection. executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.
frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the (5) access to your network.
(1)A、attachment
B、packet
C、datagram
D、message
(2)A、virtual
B、virus
C、worms
D、bacteria
(3)A、memory
B、caches
C、ports
D、registers
(4)A、names
B、cookies
C、software
D、extensions
(5)A、cracker
B、user
C、customer
D、client
参考答案：A、C、B、D、A
二、案例分析：
阅读以下说明，回答问题1 至问题5，将解答填入答题纸对应的解答栏内。
【说明】
某小区采用hfc 接入internet 的解决方案进行网络设计，网络结构如图1-1 所示。
【问题1】(3分)
网络设计流程通常由以下五阶段组成：
a.确定网络物理结构
b.确定网络逻辑结构
c.对现有网络的体系结构进行分析
d.安装和维护
e.需求分析
根据网络开发设计的过程，给出上述五个阶段的先后排序：___(1)___。
【问题2】(5分)
为图1-1 中(2)～(6)处选择对应的设备名称，填入答题纸对应的解答栏内。
备选设备：cmts、以太网交换机、光收发器、光电转换节点、cable modem
【问题3】(2分)
在答题纸对应的解答栏内填写图1-1 中(7)、(8)处对应的传输介质。
【问题4】(3分)
cable modem 接收从cmts 发送来的___(9)___调制信号，经解调后重建以太帧。在相反方向上，接收到的以太帧被封装在时隙中，经___(10)___调制后，通过hfc 网络的上行信道传送给cmts。
(9)
a.qam
b.qpsk
c.gmsk
d.dmt
(10)
a.qam
b.qpsk
c.gmsk
d.dmt
【问题5】(2分)
有线电视hfc 网络的上、下行信道是非对称的，容易产生噪声、影响传输质量的是上行信道还是下行信道?
参考答案：
【问题1】[3分]
(1)ECBAD
【问题2】[5分]
(2)以太网交换机
(3)CMTS
(4)光收发器
(5)光电转换节点
(6)Cable Modem
【问题3】[2分]
(7)光纤
(8)CATV电缆(或回答同轴电缆)
【问题4】[3分]
(9)A
(10)B
【问题5】[2分]
上行信道
