宁波大学计算机网络习题集.doc

(word完整版)宁波大学计算机网络习题集
1。In communication links， transmission rate means:
A、Bandwidth
B、propagation speed
C、process speed
D、router delays
正确答案： A
2。All communication activities in Internet are governed by：
A、Protocols
B、WebMaster
C、Client
D、ChinaTelecom
正确答案： A
3。The center of internet structure is:
A、Tier-1 ISPs
B、Local ISPs
C、Root DNS
D、NAP
正确答案： A
4.When congest occur in network， which delay become large?
A、propagation delay
B、queuing delay
C、transmission delay
D、processing delay
正确答案： B
5。The internet protocols not define:
A、order of messages
B、actions taken
C、format
D、price
正确答案： D
6.The internet protocols not define :
A、actions taken
B、order of messages
C、hacker
D、format
正确答案： C
7.Which is not the types of protocol data unit in TCP/IP？
A、frame
B、datetime
C、segment
D、message
正确答案： B
8.Which is not a connected end system device in the internet？
A、Mobile Phone
B、PC server
C、PC workstation
D、Router
正确答案： D
9.All communication activities in network are governed by ：
A、Protocols
B、Servers
C、Government
D、Clients
正确答案： A
10。For Queueing delay，in which state， average queuing delay small:
A、La/R =0。1
B、La/R =0。9
C、La/R 〉 1
D、La/R >10
正确答案： A

1应用层中的数据块常被称为:
A、比特流
B、帧
C、分组
D、消息
正确答案： D
2在TCP/IP 层次协议中，传输层向应用层提供的接口是哪一个?
A、Put
B、Port
C、Socks
D、Socket
正确答案： D
3下列哪一组协议属于应用层协议？
A、ICMP，RARP，ARP
B、FTP,SMIP，TELNET
C、ARP，IP,UDP
D、IP,TCP,UDP
正确答案： B
4在互联网WEB应用中以下哪一项扮演了控制角色?
A、HTML语言
B、Web客户端
C、HTTP协议
D、Web服务器
正确答案: C
5下面哪一个特征是HTTP协议所不具备的:
A、面向对象
B、客服机/服务器
C、无连接
D、无状态
正确答案： C
6IE8。0浏览器默认使用的超文本传输协议是哪一个版本?
A、WEB 2。0
B、HTTP1.0
C、HTTP 1.1
D、HTTP 2。0
正确答案： C
7在HTTP协议中，每一个对象的地址都可以标识为：
A、UDP
B、UML
C、UTP
D、URL
正确答案: D
8HTTP需要浏览器在每一个请求中递交认证信息，这是因为HTTP协议的哪一个特性？
A、面向连接
B、无连接
C、分布式
D、无状态
正确答案: D
9在互联网WEB应用中连接由以下哪一方发起？
A、HTML语言
B、Web客户端
C、HTTP协议
D、Web服务器
正确答案： B
10Processes running in different hosts communicate with an :
A、slotted ALOHA protocol
B、Internet routing protocol
C、application—layer protocol
D、interprocess communication
正确答案： C

1What is the default persistent model in HTTP/1。1:
A、Nonpersistent with pipelining
B、Persistent with pipelining
C、Persistent without pipelining
D、Nonpersistent HTTP
正确答案： B
2Which version of hypertext transfer protocol are used in default mode now?
A、WEB 2.0
B、HTTP1.0
C、HTTP 1.1
D、HTTP 0。9
正确答案： C
3The Http server works on which port：
A、TCP port above 65535
B、UDP 80
C、TCP port above 1024
D、TCP 80
正确答案： D
4HTTP messages (application-layer protocol messages） exchanged between browser （HTTP client) and Web server （HTTP server） with:
A、IGMP
B、ICMP
C、UDP
D、TCP
正确答案： D
5The Http client works on which port:
A、TCP port above 65535
B、UDP 80
C、TCP port above 1024
D、TCP 80
正确答案: C
6To indicates end of message in Http, we can use：
A、/body
B、/html
C、\ln\lf。\ln\lf
D、\ln\lf
正确答案： D
7Which connections can be used by HTTP/1。1 in default mode?
A、p2p connections
B、udp connections
C、non-persistent connections
D、persistent connections
正确答案： D
8WWW servers organize information into:
A、WEB pages
B、Relational Database
C、Distributed hypertext hypermedia
D、Yellow pages
正确答案： A
9Http server maintains no information about past client requests, Protocols that maintain “state” are：
A、Simple
B、Complex
C、Security
D、Easy
正确答案: B
10If you are downloading a web page with multiple objects in it, which of the following is the most efficient way？
A、None persistent HTTP
B、Persistent HTTP with pipeline
C、Persistent HTTP without pipeline
D、None of the above
正确答案： B

1What is not communication services provided to apps in network :
A、connectionless
B、connection—oriented
C、object—oriented
D、Transmission Control Protocol
正确答案： C
2How is data transferred through net，what is wrong？
A、statistical multiplexing
B、disk to disk copy
C、packet—switching
D、circuit switching
正确答案: B
3In which network， propagation delay maybe greater then queuing delay:
A、Fiber Network
B、Wire LAN
C、Satellite Network ​
D、WIFI Network
正确答案: C
4Which is not a network communication links？
A、Fiber
B、Copper
C、Subway
D、Radio
正确答案： C
5Packet-switched network's goal is moving packets through routers from source to destination via:
A、forward
B、store
C、drop
D、replay
正确答案： A
6Which Physical Media has low error rate?
A、Twisted Pair
B、Coaxial cable
C、Fiber optic cable
D、radio
正确答案： C
7Today’s Internet not use
A、TCP/IP
B、statistical multiplexing
C、Circuit switching
D、Packet-switchi
正确答案： C
8which is not Cerf and Kahn's internetworking principles ?
A、minimalism， autonomy
B、best effort service model
C、stateless routers
D、centralized control
正确答案: D
9包交换中丢失的包去哪了？
A、缓存在路由器
B、在传输媒体上飞
C、在上一个路由器
D、彻底消失了
正确答案： D
10包交换中丢失的包会阻塞网络吗?
A、会
B、不会
C、不确定
D、真不知道
正确答案： B

1The Status code for request succeeded and requested object later in this message is：
A、301 Moved Permanently
B、200 OK
C、400 Bad Request
D、404 Not Found
正确答案： B
2Which is wrong in the following statement about Client—server archicture:
A、clients communicate with server
B、clients may have dynamic IP addresses
C、clients is always-on host
D、clients do not communicate directly with each other
正确答案： C
3HTTP response status codes of requested document not found on server， is ：
A、404
B、500
C、400
D、304
正确答案： A
4Which mothed type is not provided in HTTP/1.0：
A、HEAD
B、PUT
C、POST
D、GET
正确答案： B
5In the Web Client/Server work environment, who play a control role?
A、HTML Language
B、Web Client
C、HTTP Protocol
D、Web Server
正确答案： C
6If every page of the site need User—server authorization,we can use：
A、Nonpersistent HTTP
B、Persistent HTTP
C、Conditional GET： client-side caching
D、Cookies： keeping “state"
正确答案： D
7Web page consists of ( ） which includes several referenced objects：
A、base HTML-file
B、home HTML-file
C、host HTML-file
D、referenced HTML—file
正确答案： A
8Web server maintains no information about past client requests， so HTTP is：
A、unsatisfied
B、satisfied
C、stateless
D、stateful
正确答案： C
9Which is not based on web Caching?
A、Offline Browse
B、NAT
C、CDNS
D、PROXY
正确答案： B
10In Client—server paradigm, process sends/receives messages to/from its ：
A、Firewall
B、Door
C、Socket
D、Slot
正确答案： C

1HTTP协议的服务器端口号一般为:
A、80
B、110
C、〉1024
D、〉4096
正确答案： A
2HTTP协议的客户端端口号一般为:
A、80
B、110
C、>1024
D、>4096
正确答案: C
3Http1。1中持续/流水线模式时，可以同时传多个对象吗？
A、不可以
B、可以
C、不知道
D、不确定
正确答案:
4Http1。1中持续/流水线模式时,可以同时在一个socket中传输多个对象吗？
A、不可以
B、可以
C、不知道
D、不确定
正确答案： A
5安全性更好的HTTP协议标准是什么？
A、HTTP2。0
B、HTTPS
C、HTML5
D、FLASH
正确答案: B
6互联网上哪个应用不属于WEB2.0?
A、SMS
B、SNS
C、BLOG
D、FACEBOOK
正确答案： A
7Proxy服务器在实现上主要是利用了什么方法?
A、条件更新
B、条件请求
C、动态DNS
D、动态IP
正确答案： B
8一个HTTP报文的大小可能是多大？
A、小于1480字节
B、小于64K字节
C、大于64K字节
D、理论上无限制
正确答案： D
9IE8浏览器下允许并发的连接数可能是多少？
A、1
B、2
C、4
D、8
正确答案： C
10下述哪个方法不能向服务器递交信息？
A、head
B、get
C、put
D、post
正确答案： A

1If you want to find the server of WWW.NBU。EDU。CN,select the DNS search type?
A、Type=CName
B、Type=NS
C、Type=MX
D、Type=A
正确答案： D
2Which type of DNS query can return name value of mail server associated with domain name?
A、type=NS
B、type=CNAME
C、type=MX
D、type=A
正确答案: C
3If you want to build a Content Distribution Networks，You can the DNS search type for alias：
A、Type=CName
B、Type=MX
C、Type=NS
D、Type=A
正确答案： A
4If you want to find the auhoritative name server of domain NBU.EDU.CN，select the DNS search type?
A、Type=CName
B、Type=NS
C、Type=MX
D、Type=A
正确答案： B
5In client host, we need to config IP with：
A、Root domain servers
B、Top—level domain servers
C、Authoritative DNS servers
D、Local Name Server
正确答案: D
6Which domain name is wrong?
A、cs。un.nl
B、cs.keio。ac。jp
C、eng。sun。com
D、/com/sun/eng
正确答案: D
7In DNS，“I don't know this name， but ask this server" means：
A、authoritative name server
B、recursive query
C、Local name server
D、iterated query
正确答案: D
8There is identification in DNS messages，which is a 16 bit number for query and reply to query uses ：
A、same number
B、number+1
C、number+8
D、number+16
正确答案: A
9Which is not the reason for decentralize DNS?
A、single point of failure
B、traffic volume
C、distant centralized database
D、copy right
正确答案： D
10Which is wrong for DNS：
A、query and reply messages, both with same message format
B、distributed db storing resource records (RR)
C、When a host makes a DNS query， query is sent to its Root DNS server
D、distributed database implemented in hierarchy of many name servers
正确答案： C

1When ftp server receives file command, which opens the 2nd TCP connection for file tranfer：
A、server or client
B、server and client
C、client
D、server
正确答案： A
2Ftp Client obtains authorization over control connection on port：
A、20
B、21
C、25
D、110
正确答案： B
3Which APP protocol use separate control and data connections on to port：
A、Email 110 and 25
B、Ftp 21 and 20
C、Http 80 and 808
D、Telnet 25 and 1025
正确答案： B
4FTP client browses remote directory by sending commands over:
A、IP connection
B、UDP connection
C、data connection
D、control connection
正确答案: D
5Which application is usually based on UDP and TCP protocol？
A、Network Games
B、FTP Download
C、Sending E-mail
D、Web Browsing
正确答案： A
6在下面列出的TCP/IP命令中，哪一个可以被用来远程登录主机？
A、telnet
B、ftp
C、login
D、tftp
正确答案： A
7In which, FTP data connect can initiation from port 20 on server to hight port on client？
A、Passive FTP
B、Active FTP
C、SFTP
D、TFTP
正确答案： B
8In which, FTP data connect can initiation from high port on client to high port on server？
A、Active FTP
B、Passive FTP
C、SFTP
D、TFTP
正确答案: B
9Which is not a sample commands that sent as ASCII text over control channel in FTP?
A、USER
B、PASS
C、LIST
D、HEAD
正确答案： D
10Which is not a Sample return codes in FTP?
A、304
B、331
C、125
D、425
正确答案： A

1If you want to find the mail server of domain NBU。EDU.CN，select the DNS search type？
A、Type=MAIL
B、Type=NS
C、Type=MX
D、Type=A
正确答案： C
2Which is wrong for SMTP:
A、SMTP use two separated connections for outgoing mails
B、SMTP server uses CRLF。CRLF to determine end of message
C、SMTP requires message (header & body) to be in 7-bit ASCII
D、SMTP uses persistent connections
正确答案: A
3Which is not a email application protocol?
A、SMNP
B、SMTP
C、IMAP
D、POP3
正确答案： A
4In MIME， Msword is one subtypes of Content-Type：
A、Text
B、Application
C、Image
D、Doc
正确答案: B
5In email protocol， which will not be used?
A、MINE
B、QP（Quote-Printable)
C、Base64
D、CDNS
正确答案： D
6For send email via SMTP, it requires message （header & body) to be in:
A、octet-stream
B、8—bit ASCII
C、7-bit ASCII
D、Ziped
正确答案: C
7Which one is a right email address?
A、wang＄163。com
B、wang102&
C、wang＃。cn
D、Wang＠
正确答案： D
8Which element are not in Mail Servers：
A、Mailbox contains incoming messages for user
B、Message queue of outgoing (to be sent） mail messages
C、SMTP protocol between mail servers to send email messages
D、NAT device for outgoing mails
正确答案： D
9Which is not a major components？
A、user agents
B、mail servers
C、simple mail transfer
D、gmail
正确答案： D
10SMTP uses TCP to reliably transfer email message from client to server with port：
A、21
B、25
C、75
D、110
正确答案： B

1In P2P file sharing， which is easy to shut down by law:
A、Query flooding
B、decentralized directory
C、centralized directory
D、pure Clinet/Server
正确答案： C
2In P2P file sharing， in which the group leaders can get overloaded：
A、centralized directory
B、Query flooding
C、decentralized directory
D、Pure Clinet/Server
正确答案: C
3C/S， P2P and _____ are three types of application architectures.
A、B/S
B、Hybrid of C/S and P2P
C、User to user
D、Command and Conquer
正确答案: B
4Which is not a network end system architecture model：
A、Client/Server
B、Peer-Peer
C、End—End
D、Hybrid Client/Server and Peer-Peer
正确答案： C
5The problems with centralized directory of P2P not include：
A、Copyright infringement
B、Performance bottleneck
C、Bootstrap node needed
D、Single point of failure
正确答案： C
6The problems with decentralized directory of P2P maybe:
A、Copyright infringement
B、Performance bottleneck
C、Bootstrap node needed
D、Single point of failure
正确答案: C
7In centralized directory of P2P， the disadvantages of approach maybe:
A、complex protocol
B、bootstrap node needed
C、single point of failure
D、group leaders can get overloaded
正确答案: C
8Query flooding is fully distributed，it means:
A、no distributed server
B、no central server
C、no IP needed
D、no water
正确答案: B
9Which one is wrong in P2P decentralized directory?
A、Each peer is either a group leader or assigned to a group leader
B、Group leader tracks the content in all its children
C、Peer queries other peers
D、Group leader may query other group leaders
正确答案： C
10which one is wrong in P2P with centralized directory？
A、peer is decentralized，
B、file transfer is decentralized
C、locating content is highly centralized
D、locating content is highly decentralized
正确答案： D

1邮件发送方显示邮件已经发送成功，可是有的时候接受方却没有接受到邮件，那是因为显示的仅仅为客户端发送到自己的SMTP服务器成功了.
正确答案： √
2邮件传输过程可以省略中间服务器的转发，可否直接传输到对方的邮件服务器。
正确答案： √
3书上说http方式是一个请求、一个封装、一个对象进行传送的,而我们平时通过浏览器发邮件时可以同时发送多个附件，这是矛盾的。
正确答案： ×
4EMAIL传输文件时,可以区分文件类型，文本文件使用TCP/IP协议传输，视频文件使用UDP协议传输，这样传输速度会更快。
正确答案: ×
5有时在QQ邮箱发送邮件,会挺久后才显示在发送中,可是文件本身并不大呀，这是因为邮件服务器的排队发送的队列可能比较长。
正确答案： √
6邮件服务器之间的邮件传送使用SMTP协议,客户端往邮件服务器发送邮件采用POP3协议。
正确答案： ×
7SMTP要求必须在提供了账户名和密码之后才可以登录 SMTP 服务器，这就可以彻底防止那些垃圾邮件。
正确答案: ×
8IMAP协议可以阅读邮件，但是不可以发送邮件，邮件客户端发送邮件必须用SMTP.
正确答案： √
9Base64的编码方式不能解决繁体汉字的邮件处理.
正确答案: ×

1In communication links， transmission rate means:
A、Bandwidth
B、propagation speed
C、process speed
D、router delays
正确答案： A
2When congest occur in network， which delay become large？
A、propagation delay
B、queuing delay
C、transmission delay
D、processing delay
正确答案： B
3应用层中的数据块常被称为:
A、比特流
B、帧
C、分组
D、消息
正确答案： D
4If you are downloading a web page with multiple objects in it， which of the following is the most efficient way？
A、None persistent HTTP
B、Persistent HTTP with pipeline
C、Persistent HTTP without pipeline
D、None of the above
正确答案： B
5Which one is wrong in P2P decentralized directory?
A、​Each peer is either a group leader or assigned to a group leader
B、Group leader tracks the content in all its children
C、Peer queries other peers
D、Group leader may query other group leaders
正确答案： C
6In client host, we need to config IP with:
A、Root domain （TLD） servers
B、Top—level domain (TLD) servers
C、Authoritative DNS servers
D、Local Name Server
正确答案： D
7What is the default persistent model in HTTP/1.1:
A、Nonpersistent with pipelining
B、Persistent with pipelining
C、Persistent without pipelining
D、Nonpersistent HTTP
正确答案： B
8Which domain name is wrong？
A、cs。un.nl
B、cs.keio。ac。jp
C、eng.sun。com
D、/com/sun/eng
正确答案： D
9IE8浏览器下允许并发的连接数可能是多少？
A、1
B、2
C