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1、四 川 大 学期 考 试 试 题（B） 闭卷（2008 2009 学年第 2 学期）课程号：30306230 课序号：0 7 课程名称：计算机网络与通信计算机网络与通信 任课教师： 等等 成绩： 适用专业年级：06 学生人数： 印题份数： 学号： 姓名：考考 试试 须须 知知四川大学学生参加由学校组织或由学校承办的各级各类考试，必须严格执行四川大学学生参加由学校组织或由学校承办的各级各类考试，必须严格执行四川大学考试工作四川大学考试工作 管理办法管理办法和和四川大学考场规则四川大学考场规则 。有考试违纪作弊行为的，一律按照。有考试违纪作弊行为的，一律按照四川大学学生考试违纪作四川大学学生考试违
2、纪作 弊处罚条例弊处罚条例进行处理。进行处理。 四川大学各级各类考试的监考人员，必须严格执行四川大学各级各类考试的监考人员，必须严格执行四川大学考试工作管理办法四川大学考试工作管理办法 、 四川大学考四川大学考 场规则场规则和和四川大学监考人员职责四川大学监考人员职责 。有违反学校有关规定的，严格按照。有违反学校有关规定的，严格按照四川大学教学事故认定四川大学教学事故认定 及处理办法及处理办法进行处理。进行处理。第一题第一题第二题第二题第三题第三题第四题第四题第五题第五题总分总分一、英译汉（一、英译汉（10 分）分）1.ISP INTERT 服务供应商 2. NIC 网络接口卡 3. DNS
3、域名服务系统 4. MAC 介 质接入控制 5 BGP 边界网关协议 6. MSS 最大数据段尺寸 7. FTP 文件传输协议 8 MPLS 多协议标签交换 9 AS 自治系统 10. packet switching 分组交换二、单项选择题单项选择题 （每小题（每小题 l. 5 分，共分，共 30 分分)1We refer to the link-layer packets as D A. messagesB. segmentsC. datagramsD. frames 2The IP protocol lies inC A. application layerB. transport la
4、yerC. network layerD. link layer3 A is a Circuit-switched network.A. TDMB. Datagram network C. InternetD. virtual circuit network4The packet experiences a B delay as it waits to be transmitted onto the link. A. processing delayB. queuing delayC. propagation delayD. transmission delay 5DWhich the fol
5、lowing protocols does not use TCP/IP as its underlying protocols? A.SMTP; B.FTP; C.TELNET; D.TFTP 6What is used to specify placement of text, files and objects that are to be transferred from the web server to the client? B A. HTTP B.HTML C.HDLC D. All of the above7bandwidth is described in _B_A) By
6、tes per second B) Bits per secondC) megabits per millisecond D) centimeters 8) _B_ Is a protocol for transferring a file from one host to another host. A. SMTP; B.FTP; C.TCP; D. UDP9In TCP/IP stack, the transport layers flow control mechanism uses B A) slow startB) congestion avoidance C) three hand
7、-shakingD) sliding window10Compared with rdt2.0, the new service in rdt3.0 is to implement the reliable data transfer over the channel with B A)bit errorB) data lossC) data transfer delayD) congestion11ICMP control messages are transferred in D data unit.A) TCPB).UDPC).ARPD).IP12The reliable data de
8、livery between end systems is provided in the C layer of TCP/IP architecture. A) network layerB) data link layerC) transport layerD) session layer13What is the main function of the network layer? _A_A. node-to-node delivery; B. process-to-process message deliveryC synchronization; D.updating and mai
9、ntenance of routing tables14Which IP address is ineffective _D_. A) 202.131.45.61 B) 127.0.0.1 C) 192.168.0.2 D) 290.25.135.1215If IP address is 198.108.126.66, subnet mask is 255.255.255.224, then subnet prefix is _C_. A) 198.108.126.60 B) 198.108.126.0 C) 198.108.126.64 D) 198.108.126.22416The out
10、put port of a router dont perform _C_ functions. A) the physical layer functions B) the data link layer functions C) network management D) buffer management17There are two broad classes of packet-switched networks: datagram networks and virtual-circuit networks. datagram networks forward packets in
11、their switches use _B_.A) MAC addresses B) IP addressesC) e-mail addresses D) virtual-circuit numbers18.as show below, which technology isnt typical access networks technongy. CA) digital subscriber line B) hybrid fiber-coaxial cableC) circuit switching D)wireless access 19Which layer-function is mo
12、stly implemented in an adapter（NIC）? _A_ A) physical layer and link layer B) network layer and transport layer C) physical layer and network layer D) transport layer and application layer20_A_Which device cant isolate the departmental collision domains. A) Hub; B) switch; C) router; D) A and B注：1 试题
13、字迹务必清晰，书写工整。 本题 4 页，本页为第 1 页2 题间不留空，一般应题卷分开 教务处试题编号：3 务必用 A4 纸打印 三、填空题三、填空题 （每空（每空 1 分，共分，共 20 分分 ）1_protocols_ define format, order of messages sent and received among network entities, and actions taken on message transmission, receipt. 2The time required to examine the packets header and determin
14、e where to direct the packet is part of the _processing_delay. 3Any network that forwards packets according to host destination addresses a _datagram_ network. 4Within the Internet the most important delays that packet suffered are _processing_ delay, queuing delay, _propagation_ delay, and _transmission_ delay. 5Two important network-layer functi
