2004-2005春夏学期《计算机网络基础》期末试卷

浙江大学２００４–２００５学年春夏季学期　

《计算机网络基础》课程期末考试试卷　

开课学院：计算机学院　，考试形式：闭，允许带＿＿＿＿＿＿＿＿＿＿＿入场　考试时间：　２００５　年　７月　５日，所需时间：　１２０　分钟　

考生姓名：　　　　　　　　　　　　　　学号：　　　　　　　　　专业：　　　　　　　　　　　　　　　　　　

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一、　Please select the best choice for following questions (50 points) 1. What is the advantage of using a layered model of networking? A. Simplified the network

B. For the purpose of standardization

C. Divides the complexity of internetworking into discrete, more easily learned operation subsets

D. All of the above

2. What is the name of protocol data unit (PDU) at the network layer of the OSI reference model?

A. Transport B. Frame C. Packet D. Segment

3. Which is true when a broadcast is sent out in an Ethernet 802.3 LAN?

A. The broadcast is sent only to the default gateway.

B. The broadcast is sent only to the destination hardware address in the broadcast. C. The broadcast is sent to all devices in the collision domain. D. The broadcast is sent to all devices in the broadcast domain.

4. Segmentation of a data stream happens at which layer of the OSI model?

A. Physical B. Data Link C. Network D. Transport

5. Which of following international standard defines for Fast Ethernet?

A. IEEE 802.3 B. IEEE 802.3z

C. IEEE 802.3u D. IEEE 802.3ae

6. What does the Data Link layer use to find hosts on a local network?

A. Logical network addresses B. Port numbers

C. Hardware addresses D. Default gateways

7. What were the key reasons the ISO released the OSI model?

A. To allow companies to charge more for their equipment B. To help vendors create interoperable network devices

C. To help vendors create and sell specialized software and hardware D. So the IBM mainframe would be replaced with the PC 8. What is used at the Transport layer to stop a receiving host’s buffer from overflowing?

A. Segmentation B. Packets

C. Acknowledgments D. Flow control

9. When data is encapsulated, which is the correct order?

A. Data, frame, packet, segment, bit B. Segment, data, packet, frame, bit C. Data, segment, packet, frame, bit D. Data, segment, frame, packet, bit 10. What does the term “Base” indicate in 100Base-TX?

A. The maximum distance B. The type of wiring used

C. A LAN switch method using half duplex

D. A signaling method for communication on the network 11. What is the maximum distance of 100Base-T?

A. 100 feet B. 1000 feet C. 100 meters D. 1000 meters

12. Which of the following would describe a transport layer connection that would ensure reliable delivery? A. Routing

B. Acknowledgments C. Switching

D. System authentication

13. Which of the following is not considered a reason for LAN congestion?

A. Low bandwidth

B. Too many users in a broadcast domain C. Broadcast storms D. Routers

14. Which of the following are two basic types of dynamic routing?

A. Static and default

B. TCP and UDP exchange

C. Distance-vector and link-state D. None of the above

15. If your LAN network is currently congested and you are using only hubs in your network, what would be the BEST solution to decrease congestion on your network? A. Cascade your hubs.

B. Replace your hubs with switches. C. Replace your hubs with routers. D. Add faster hubs.

16. What technology is a used by most switches to resolve topology loops and ensure that data flows properly through a single network path? A. RIP B. STP C. IGRP

D. Store-and-forward

17. Which of the following is one of the characteristics of IP? A. reliable and connectionless B. unreliable and connectionless C. reliable and connection-oriented D. unreliable and connection-oriented

18. What is the valid host range for subnet 172.16.10.16 (Mask 255.255.255.240)?

A. 172.16.10.20 through 172.16.10.22 B. 172.16.10.16 through 172.16.10.23 C. 172.16.10.17 through 172.16.10.31 D. 172.16.10.17 through 172.16.10.30

19. What range of addresses can be used in the first octet of a Class B network address?

A. 1–126 B. 128–190 C. 128–191 D. 129–192

20. Which of the following is not true?

A. IP is connectionless and provides routing. B. ARP is used to find an IP address of a host. C. UDP is connectionless. D. TCP is connection oriented.

21. Which class of IP address provides a maximum of only 254 host addresses per network ID?

A. Class A B. Class B C. Class C D. Class D

22. Which protocol tool use ICMP?

A. Telnet B. Ping C. ARP D. FTP

23. Which of the following is an IEEE standard for frame tagging?

A. 802.1X

B. 802.3Z C. 802.1Q D. 802.3U

24. A client will use ____ to send emails to mail-server. A. POP3 B. SMTP C. TELNET D. FTP

25. Which protocol used in PPP allows multiple Network layer protocols to be used during a connection? A. LCP B. NCP C. HDLC D. X.25

26. When too many packets are present in the subnet, performance degrades. What is this situation called?

A. dead lock B. congestion C. network fault D. network busy

27. Which language can be used to realize the client-side dynamic web page generation?

A. CGI B. ASP

C. JavaScript D. PHP

28. The two-wire connections between each subscriber’s telephone and the end office are known in the trade as the____.

A. trunk B. local loop C. link D. switch

29. When web page is transmitted over …… 此处隐藏：5191字，全部文档内容请下载后查看。喜欢就下载吧 ……