宁波大学 2009 / 2010 学年第 1 学期考试卷（○A/B）

课号：_ 101G09XT1 _ 课名： 计算机网络__

一、单选题，每题仅一个正确答案，每题1.5分，共30分：

[ ]1. Which is not a network communication links?

D.Subway

[ ]2.Which is not the types of protocol data unit in TCP/IP?

C.datetime

[ ]3.In which state the delays of router become small?

A. La/R ~ 0

[ ]4.When congest occur in network, which delay become large?

B.queuing delay

[ ]5.Application protocol define the types of messages exchanged, which are:

A.request & response messages

[ ]6.Which version of hypertext transfer protocol are used in default mode now? C.HTTP 1.1

[ ]7.The Http client works on which port: C.TCP port above 1024

[ ]8.To indicates end of message in Http, we can use:

A.Carriage return and line feed

[ ]9.Which is not an email protocol: C.Emule

[ ]10. TCP retransmission can not be caused by:

D. ACK

[ ]11. Which of the following measures the time from one segment transmission to ACK receipt:

A. sample RTT

[ ]12. Which event will not be in TCP Receiver:

C.Arrival of out-of-order segment higher-than-expect seq. # . No gap detected.

[ ]13.TCP Flow Control is a speed-matching service for matching:

A.the sender rate to the receiving application’s drain rate

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宁波大学 2009 / 2010 学年第 1 学期考试卷（○A/B）

课号：_ 101G09XT1 _ 课名： 计算机网络__

[ ]14.Which one is not the mechanism of TCP Congestion Control:

C.FIFO

[ ]15.In RDT protocol, which can increase the use of physical resources: C.Pipeline

[ ]16. Which one is not the Key Network-Layer Functions in today’s internet:

C. Connection setup

[ ]17. Which of the following IP address belongs to category C address?

A. 210.98.3.4

[ ]18.Network address translation implement in NAT router, it must use:

C．NAT translation table

[ ]19. ICMP do not error reporting about:

D. unknown username

[ ]20. In Ethernet’s CSMA/CD Jam Signal make sure:

A.other transmitters are aware of collision

二、多选题，每题有2-3个正确答案，请在正确项前打钩(全钩不给分)，每题2分，共20分： 1. The communication services be provided to applications, It can be: [ ]A.connectionless

[ ]B.connection-oriented

2.Which are application architectures model in the internet? [ ]A.client/server model [ ]B.peer-peer model

[ ]C.browser/server model

3. User Agent is an interface with user “above” and network “below”, such as: [ ]A.Web: browser

[ ]B.E-mail: mail reader

[ ]D.Streaming audio/video: media player

4.Ftp protocol can work in which model that listed: [ ]A.PASV model [ ]C.Port model

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宁波大学 2009 / 2010 学年第 1 学期考试卷（○A/B）

课号：_ 101G09XT1 _ 课名： 计算机网络__

5. The problems with centralized directory of P2P maybe: [ ]A.Single point of failure [ ]C.Performance bottleneck [ ]D.Copyright infringement

6.Which services are not available in TCP: [ ]A.delay guarantees

[ ]C.bandwidth guarantees

7. In TCP congestion control, there are those State in TCP Sender: [ ]A. Congestion Avoidance [ ]C. Slow Start [ ]D. Timeout

8.In TCP three way handshake, it will be:

[ ]A.client host sends TCP SYN segment to server

[ ]C.server host receives SYN, replies with SYN/ACK segment [ ]D.client receives SYN/ACK, replies with ACK segment

9.Those are the routing in the Internet: [ ]A.RIP [ ]B.OSPF [ ]D.BGP

10.Those are the Random Access Protocols： [ ]B.CSMA [ ]C.CSMA/CD

三、名称缩写选择，请在匹配项上填写缩写编号，如果在下列18个选项中没有， 可以在19－20项中自主添加选项。共10分：

[ 1 ]往返时间 [ 20 ]可靠传输协议 [ 13 ]网络接口卡 [ 17 ]自治系统 [ 12 ]网络地址翻译协议 [ 5 ]用户数据报协议 [ 10 ]协议数据单元 [ 9 ]动态地址分配协议

[ 19 ]Internet协议 [ 3 ]生存时间

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19.( IP )20.( RDT )

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