诺西文档(资料)开发工程师笔试题.pdf

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1、诺西文档（资料）开发工程师笔 试题Test for Can didates Directions:1.Please answer all the questions in another paper.(请在另外一张白纸上答题 2.Fill in your name in the paper.(在白纸上写上你的名字 3.Try to finish the exam within 1 hour.(尽量在 1 小时内完成 Part I Please give the English and Chinese descriptions to the following abbreviati ons(20

2、p,2 poin t/questi on.e.g.BGP:Border Gateway Protocol,边界网关协议 1.ADSL:2.SIP:3.AAA:4.PPPoE:5.DSLAM:6.CDMA:7.ATM:8.RADIUS:9.POTS:10.P-CSCF:Part II There is only one correct answer for each question,please mark the right one with 7 (10p，1 point/question.IL The range of 0 Hz to 4 kHz is reserved for analog

3、 voice traffic.ADSL occupies frequencies above that range.What is the upper boundary for current ADSL implementations?A.3 kHz B.4 kHz C11 MHz D.40 kHz 12.Which layer of the OSI reference model is responsible for ensuring reliable end-to-end delivery of data?A.Application B.Presentation C.Session I).

4、Transport E.Nehvork F.Data-Link 13.Four LAN switches are connected together as shown in the figure below:Study the figure carefully.What is the purpose of the Spanning Tree Protocol(STP that is operating in the switch topology?A.To elect a particular switch as backup desig nated switch.B.To preve nt

5、 frames from loop ing and have one active Layer 2 path through the switches n etwork.C.To select the best path to a remote destination that is on a different network.D.To lear n the MAC addresses of host attached to the switches n etwork.E.To distribute VLAN con figurati on in formatio n throughout

6、the switched n etwork.13.What protocol is used to find the hardware address of a local device?A.RARP B.ARP Nokia Siemens“-Hi.Switch A Priority;8 C.IP D.ICMP E.BootP 14.You want to implement a mechanism that automates the IP configuration,in cludi ng IP address,sub net mask,default gateway,and DNS in

7、 formati on.Which protocol will you use to accomplish this?A.SMTP B.SNMP C.DHCP D.ARP 15.Which class of IP address provides a maximum of only 254 host addresses per n etwork ID?A.Class A B.Class B C.Class C D.Class D E.Class E 16.If you use either Telnet or FTP,which is the highest layer you are usi

8、ng to tran smit data?A.Applicati on B.Prese ntati on C.Sessi on D.Tran sport 17.The DoD model(also called the TCP/IP stack has four layers.Which layer of the DoD model is equivale nt to the Network layer of the OSI model?A.Applicati on B.Host-to-Host C.I nternet D.Network Access 19.The following ill

9、ustration shows a data structure header.What protocol is this header from?A.IP B.ICMP C.TCP D.UDP E.ARP F.RARP 20.PAT allows which of the following?A.One-to-one IP address translation through the CPE router B.Many-to-one IP address translation through the CPE router C.Applicatio n-specific port nu m

10、bers to be manu ally con figured for tran slati on Source port(16)Destination port(16)Sequence number(32)Acknov;ledgme urt number(32)Header.“土，“length(4)Reserved Code bits(6)Window(16J Checksum(16)Urgent(16)Options(0 or 32 if any)8ItO BH15 BU16 Bit 31 D.Static IP address tran slati ons Part 川 There

11、are at least two correct answers for each question,please mark the right answers with“V”(20p,2 point/question.21.What are the decimal and hexadecimal equivale nts of the binary nu mber 10011101?(Choose two.A.159 B.157 C.185 D.0 x9D E.0 xD9 F.0 x159 22.Which of the followi ng describe the DHCP Discov

12、er message?(Choose two.A.It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.B.It uses UDP as the Tran sport layer protocol.C.It uses TCP as the Tran sport layer protocol.D.It does not use a layer 2 dest in ati on address.23.Which stateme nts are true regard ing ICMP packets?(Choose two.A.They ack no w

13、ledge receipt of a TCP segme nt.B.They guara ntee datagram delivery.C.They can provide hosts with in formati on about n etwork problems.D.They are en capsulated within IP datagrams.E.They are en capsulated within UDP datagrams.24.Which of the following are TCP/IP protocols used at the Application la

14、yer of the OSI model?(Choose three.A.IP B.TCP C.Tel net D.FTP E.TFTP 25.Which of the followi ng are private IP addresses?A.12.0.0.1 B.168.172.19.39 C.172.20.14.36 D.172.33.194.30 E.192.168.24.43 F.10.141.0.226.Which of the followi ng are reas ons why WFQ might discard a packet in stead of putting it

15、 into the correct queue?A.The hold-queue limit for all comb ined WFQ queues has bee n exceeded.B.The queue len gth for the flow has passed the WRED minimum drop threshold.C.T he WFQ queue len gth for the queue where the n ewly arrived packet should be placed has exceeded the CDT.D.ECN feedback has b

16、ee n sig naled,requesti ng that the TCP sen der slow dow n.27.Which of the followings are not functions of the LAN Emulation Client(LEC?A.Co ntrol B.Data forwardi ng C.Address resoluti on D.ELAN assig nment 28.Which of the follow ing protocols can provide authe nticati on services?A.PIX B.Logg ing C

17、.RADIUS D.TACACS+E.Firewall feature set 29.In OSPF,where can a router get the router ID from?A.Loopback IP address B.Lowest IP address of an active in terface whe n OSPF starts C.Highest IP address of an active in terface whe n OSPF starts D.MAC address of Ether net in terface E.OSPF process ID 30.W

18、hich methodologies are used to facilitate ADSL conn ectivity to subscribers?A.PPPoE B.VoIPoFR C.PPPoA D.QoS Long Term Busin ess Support,Network Systems Part IV An swer the followi ng questi ons.31.Please tran slate the follow ing paragraphs from Chin ese to En glish,the 1st sentence is an example.（2

19、0p,about 200 Chin ese words 一个虚拟路由器是一个路由设备中静态或动态线程的集合，提供类似物理路由器的路由和转发服 务。从虚拟专用网（VPN）用户的角度来看，虚拟路由器应该与物理路由器尽可能地 相同。换言之，除了极个别情况外，虚拟路由应该在各方面（配置、管理、检测、故障排除）都 象一个专用的物 理路由器。虚拟路由器包括如下功能：1.对任意路由协议组合的配置 2 对网络的检测 3.故障排除每个 VPN 都有一个逻辑上独立的路由域，这样 SP 就可以更好地为用户提供相当灵活的虚拟路由 器服务，而无需为每一个 VPN 准备一个物理路由器。A virtual router i

20、s a collecti on of threads,either static or dyn amic,in a routi ng device,that provides routi ng and forwardi ng services much like physical routers.32.Accordi ng to you experie nee,do you thi nk what qualifications one should have as a technical writer?How to improve the quality of Customer Docume nts?(20p 33.Talk about your career desig n?谈谈你的职业规划？(You can an swer in Chi nese for this questio n,10p Nokia Sieme ns Networks 10/13/2010 6