问题CCNA

寒雪 · 发表于 2004-4-6 16:24:45

QUESTION NO: 84 Which statements is true regarding the command sequence shown below? (Choose three) RouterA(config)# interface loopback 0 RouterA(config-if)# ip address 192.168.31.33 255.255.255.255 A. It creates a virtual, software only, interface. B. It uses a wildcard mask of 255.255.255.255. C. It ensures that an interface is always active for OSPF processes. D. It provides a way to test the convergence of OSPF routing updates. E. The mask of 255.255.255.255 is called a host mask. F. These commands can only be issued to configure serial interfaces. Answer: A, B, D QUESTION NO: 36 You are a network technician at TestKing. You have told a newly appointed trainee that the OSI model has 7 layers and that the Application layer is the highest layer. The trainee is curious as to which protocols operate at the application layer. What should you tell him? (Choose all that apply.) A. TCP B. Telnet C. FTP D. SNMP E. IP Answer: B C（D怎么不选择应该选择B,C,D） QUESTION NO: 113 Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two) A. Router(config)# router ospf 0 B. Router(config)# router ospf 1 C. Router(config)# router ospf area 0 D. Router(config-router)# network 192.168.16.0 0.0.0.255 0 E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0 F. Router(config-router)# network 192.168.0 255.255.255.0 area 0 Answer: B, E (A怎么不能选择) QUESTION NO: 34 You are a network technician at TestKing. A newly appointed trainee wants to know what the differences and similarities between bridges and switches are. What would your reply be? (Choose all that apply.) A. Bridges are faster learners than switches due to fewer ports. B. Bridges and switches increase the size of a collision domain. C. A bridge will forward a broadcast but a switch will not. D. Bridges and switches learn MAC addresses through examining the source MAC address. E. A switch is a uniport bridge, Answer: B C （D的怎么不行应该是B,D） QUESTION NO: 115 OSPF routing makes use of areas. What are the characteristics of these areas? (Choose all that apply.) A. Hierarchical OSPF networks do not need multiple areas B. Multiple OSPF areas must connect to area 0 C. Single area OSPF networks must be configured in area 1 D. Areas can be assigned any number from 0 to 63535 E. Area 0 is called the backbone area F. Each OSPF area need to be configures with a loopback interface Answer: B, C, E（B，D，E） ExplanationIn multiple area OSPF networks, all areas must connect to th backbone area which is disgnated Area 0. In Single area OSPF networks, there is no backbone,. There fore the Area is designated Area 1 QUESTION NO: 131 Which characteristics describe the routing protocol EIGRP? (Choose two) A. Has a maximum hop count of 255 B. Uses a 32-bit metric C. Can differentiate between internal and external routes D. Supports a single routed protocol E. Can maintain only a single routing table F. Required all networks within an AS to use the same subnet mask Answer: B, C QUESTION NO: 170 You work as network technician at TestKing and you are now required to apply an access list on a virtual terminal line of a router. Which command should you use? A. RouterTK(config-line)# access-class 10 in B. RouterTK(config-if)# ip access-class 23 out C. RouterTK(config-line)# access-group 15 out D. RouterTK(config-if)# ip access-group 110in E. RouterTK(config-line)# access-list 150 in F. RouterTK(config-if)# ip access-list 128 out Answer: B 应该选择A QUESTION NO: 173 Which of the following describe the process identifier that is used to run OSPF on a router? (Choose two) A. It is locally significant. B. It is globally significant C. It is needed to identify a unique instance of an OSPF database. D. It is an optional parameter required only if multiple OSPF processes are running on the router. E. All routers in the same OSPF area must have the same process ID if they are to exchange routing information. Answer: VLAN 三种技术1。基于端口 2。MAC 3。IP address 具体原理和配置命令？？？ 只有一个IP address 要做NAT 也要做内网WEB服务器怎么来实现？？ 21.0 QUESTION NO: 4 What is the most common layer 2 device? A. Hub B. Bridge C. Switch D. Router Answer: C Explanation: A switch segments the network and uses an ASIC for fast switching. It has become the most common layer two device. Chapter: 6 QUESTION NO: 11 When enabling EIGRP routing, what parameters must you apply? A. broadcast address, and AS number B. network number and AS number C. igrp routing, network number, and passive interface D. igrp routing, network number, and AS Answer: D Explanation: To enable EIGRP on your router, you must specify EGRP routing, the network number, and the AS system number. Chapter: 应该选择（B） QUESTION NO: 12 What is a connection protocol at the Host to Host layer? A. ARP B. RARP C. TCP D. UDP E. IP F. ICMP G. BootP Answer: C Explanation: Transport Protocol is a connection protocol that resides at the Host to Host layer of the DOD stack and handles connection oriented communication. Chapter: 6(D怎么不能) QUESTION NO: 32 Which of the following statements is true in regards to Frame Relay Multipoint subinterfaces? A. An ip address is required on the physical interface B. All routers are required to be fully meshed C. All routers must be in the same subnet to forward routing updates and broadcasts D. Multipoint is the default configuration for Frame Relay subinterfaces Answer: C Explanation: Unlike Frame Relay point-to-point connections, multipoint Frame Relay router interfaces must all be in the same subnet. Chapter: 7 QUESTION NO: 41 You are a technician at TestKing. You add a new workstation to the Testking network. The workstation is to be used by a new employee. The employee is unable to connect to the server at IP address 192.168.10.98/27. Identify the incorrectly configured network parameter. Examine the exhibit. A. Workstation IP address B. Workstation subnet mask C. Workstation default gateway D. Router interface E0 ip address Answer: C Explanation: QUESTION NO: 27 What are the characteristic of link state routing protocols? (Choose all that apply.) A. The exchange of advertisement is triggered by a change in the network. B. All routers exchange routing tables with each other iIn a multipoint network. C. Packets are routed based upon the shortest path to the destination. D. Paths are chosen depending on the cost efficiency factor. (delay) E. Every router in an OSPF area is capable of representing the entire network topology. F. Only the designated router in an OSPF area can represent the entire network topology. Answer: A C E QUESTION NO: 37 You are a network technician at TestKing. TestKing has its head office in Berlin and a branch office in Bonn. You are troubleshooting the WAN link between head office and the branch office. You replace a Cisco router that was providing Frame Relay connectivity at the Bonn site with a frame relay router from a different vendor. However, connectivity broke down between the two offices. What is the most likely cause of the problem? A. Mismatched LMI types. B. Incompatible encapsulation types.???? C. Mismatching IP addresses. D. Incorrect DLCI. Answer: A Explanation: Three LMI protocol options are available in Cisco IOS software: Cisco, ITU, and ANSI. Each LMI option is slightly different and therefore is incompatible with the other two. As long as both the DTE and DCE on each end of an access link use the same LMI standard, LMI works fine.

chinamoon · 发表于 2004-4-8 05:52:36

cc，辛苦了。

cwav · 发表于 2004-4-8 01:55:43

UESTION NO: 27 What are the characteristic of link state routing protocols? (Choose all that apply.) A. The exchange of advertisement is triggered by a change in the network. B. All routers exchange routing tables with each other iIn a multipoint network. C. Packets are routed based upon the shortest path to the destination. D. Paths are chosen depending on the cost efficiency factor. (delay) E. Every router in an OSPF area is capable of representing the entire network topology. F. Only the designated router in an OSPF area can represent the entire network topology. Answer: A C E ：）需要解释什么？

cwav · 发表于 2004-4-8 01:57:19

QUESTION NO: 37 You are a network technician at TestKing. TestKing has its head office in Berlin and a branch office in Bonn. You are troubleshooting the WAN link between head office and the branch office. You replace a Cisco router that was providing Frame Relay connectivity at the Bonn site with a frame relay router from a different vendor. However, connectivity broke down between the two offices. What is the most likely cause of the problem? A. Mismatched LMI types. B. Incompatible encapsulation types.???? C. Mismatching IP addresses. D. Incorrect DLCI. Answer: A Explanation: Three LMI protocol options are available in Cisco IOS software: Cisco, ITU, and ANSI. Each LMI option is slightly different and therefore is incompatible with the other two. As long as both the DTE and DCE on each end of an access link use the same LMI standard, LMI works fine. You replace a Cisco router 注意这句话

cwav · 发表于 2004-4-8 01:57:53

终于答完了，下次记住别发这么长的，大家一看就怕啊～可以分成N次贴嘛！切记！！

chinamoon · 发表于 2004-4-8 09:00:08

这些郑老师都和你们沟通过了。cc也解释得很好了，如果还有问题，请另外发文探讨。

cwav · 发表于 2004-4-8 09:09:19

呵呵，切记不要发长篇，很烦的

chinamoon · 发表于 2004-4-8 12:03:06

可以一个case一个case地贴。

cwav · 发表于 2004-4-8 15:28:48

嗯，对！

cmsc · 发表于 2004-4-9 01:50:42

原文由 [B]cwav[/B] 发表: VLAN 三种技术1。基于端口 2。MAC　3。IP address 具体原理和配置命令？？？ ：）还有一种，基于组播的，具体原理和配置……说来话长……略～

端口，MAC，Layer 3 address，还有一种应该是基于策略划分的吧！/;)

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