计算机网络原理（双语）A.docx

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1、局屈柜.肥料景料ton糊 .源O CN8 .料8-K担衣蝗B料艰 幕 叵 U-：e 差 氐 *：公 二 域考试科目计算机网络原理（双语）考试性质考试命题冯健审批8、（）是工作在进程到进程的功能层次A.应用层B.传输层C.网络层D.数据链路层9、关于网桥和中继器对数据转发的叙述，准确的是（）.A.中继器根据MAC地址转发数据的；网桥是工作在链路层，也是根据MAC地址转发数据的.B.中继器只是对收到的信号进行整形、再生、放大而转发数据的：网桥是工作在链路层，根据 MAC地址转发数据的。C.中继器根据MAC地址转发数据的，网桥是工作在物理层对收到数据进行转发的。D.中继器只是对收到的信号进行整形、再

2、生、放大而转发数据的：网桥是工作在物理层，对 数据转发的。10、令牌桶算法用于（）A.流量控制B.拥塞控制C.差错控制D.路由选择二、判断对错（每小题1分共10分）1、ATM cell size is 64 bytesT F2 The Subnet mask is used to identify the host within a networkT F3、Connection oriented transfer is usually unreliable.T F4、IP fragments are re-assembled at the destination.T F5、The Ethern

3、et protocol provides reliable transfer.T F6、UDP provides a simple flow-control mechanism.T F7、OS PF is the only intra-AS routing protocol （an intra-AS is a protocol that routes packets within an Autonomous System） use in the Internet.T F8、 In a Go-Back-N protocol, the loss of a single packet can cau

4、se the retransmission of many correctly received packetsT F9、Error correction is provided in the transport layer.T F10、DNS runs on top of TCPT F试卷类型A考试地点临潼学生班级网工07 （）班成绩一、单项选择题（每小题2分共20分）1、OSI参考模型有哪些层，按顺序回答？（）A.应用层，传输层，网络层，物理层B.应用层，表示层，会话层，传输层，网络层，数据链路层，物理层C.应用层，表示层，会话层，网络层，传输层，数据链路层，物理层D.应用层，会话层，传输

5、层，物理层2、C类网络地址（在没有子网的情况下）支持多少个主机？（）A. 254B. 65.000C. 255D. 16.0003、在TCP协议中，序号小于（）的端口称为熟知端口（well-known port）。A. 64B. 128C. 256D. 10244、比特串在接收站经过删除“0”比特后的代码为:（）A. B. C. D. 5、在WINDOWS2000操作系统中要查看主机间的连通性，可在MS-DOS方式运行（A. PingB. TraceriC. IpconfigD. Route Print6、在下面给出的协议中，（）是TCP/IP的应用层协议A. UDPB. RARPC. IPD

6、. DNS7、一个快速以太网交换机的端口速率为100Mbps,若该端口可以支持全双工传输数据，那么该端口实际 的传输带宽为（）。A. 100 Mbps B. 150 MbpsC. 200Mbps D. 1000Mbps考试科目计算机网络原理(双语)试卷类型A学生班级网工07 ()班1、Let g(x)=x3+x+l. Consider the information sequence 1001.Solutions follow questions:三、匹配术语(每个2分，共10分)(1) Physical layer (2) ICMP (3) router (4) multicast (5)

7、UDP(a) Provides reliable end-to-end data transport(b) A protocol fbr the transport layer(c) Transmission of bit stream(d) Delivery of IP datagrams to multiple receivers(e) Used fbr IP-related error reports and queries(f) A connecting device working in Network layer(g) An agreement between the commun

8、icating parties四、简答题(每题7分，共35分)1、How does CSMA/CA work?2、What is the difference between a switch and a router? What effect does this have on the number of times they must forward a message.3、Describe all of the DNS messages that must be sent in order to retrieve a URL such as “”. Assume no cache hit

9、s and assume iterative queries.4、Explain the difference between flow control and congestion control.(1) Find the codeword(码字)corresponding to the resulting information sequence.(2) Suppose that the codeword has a transmission error in the first bit. What does the receiver obtain when it does its err

10、or checking?2、(1) How many hosts at maximum can XUST supply with public IP addresses?(2) Suppose there are 8 colleges that XUST needs to distribute the IP addresses to. Suppose the IP address demand from each college is the same.What will be the block of IP addresses allocated to each college? How m

11、any hosts can each college supply with public IP addresses?(3) Suppose there are 6 colleges (hat XUST needs to distribute the IP addresses to. Two of the colleges request twice as much IP addresses as the other 4.What will be the block of IP addresses allcxrated to each college? How many hosts can each college supply with public IP addresses?5、Which problem does the three-way handshake protocol solve?五、综合题（第1小题10分，第2小题15分，共25分）西安科技大学20 20 学年第 学期考试试题（卷）学院：班级：姓名：学号:装订线装订线以内不准作任何标记装订线咪改革皿 直前滁晦 铢忖浩魁