2006-2007第二学期计算机网络试卷1A.doc

天津理工大学考试试卷 200 ～ 200 学年度第 学期 《计算机网络技术》 期末考试试卷 课程代码： 0600100 试卷编号： 命题日期： 200 年 月 日 答题时限： 120 分钟 考试形式：闭卷笔试 得分统计表： 大题号 总分 一 二 三 四 五 PART Ⅰ: Choice (2 point per question – total: 20 points) 得分 1. Which of the following services does the Internet network layer provide for the Internet transport layer? In-order delivery of data segments between processes Best effort delivery of data segments between communicating hosts Multiplexing and demultiplexing of transport layer segments Congestion control 2. The main task of the Internet’s Domain Name System (DNS) is to: Translate port numbers to IP addresses Specify the standards for Internet domain names Provide an authority for registering domain names Translate mnemonic（记忆的） names to IP addresses 3. The maximum transfer unit(MTU) in Ethernet frame structure is ( )byte . A. 1000 B. 1500 C. 800 D. 2000 4. Which is not plug and play in the following four items? ( ) A. NIC B. Hubs C. Routers D. Switches 5. Which of characters is not distance-vector algorithm’s characters？（ ） A. iterative B. global C. asynchronous D. distributed 6. The header of IPV6 is （ ）byte. A. 80 B. 60 C. 40 D. 20 7. Two important reasons that the Internet is organized as a hierarchy of networks for the purposes of routing are: Least cost and maximum free circuit availability Scale and administrative autonomy Message complexity and speed of convergence Link cost changes and link failure 8. The host component of a CIDR address of the form a.b.c.d/22 can contain addresses for: 2(32-22) hosts (minus “special” hosts) 512 hosts (minus “special” hosts) d times 22 hosts 10 hosts (minus “special” hosts) 9. The primary function of the address resolution protocol (ARP) that resides in Internet hosts and routers is: To provide LAN router functions To translate between LAN addresses and physical interface addresses To translate IP addresses to LAN addresses To calculate the