ccna 10月8号后战报
10月8号1000分PASS The network 172.25.0.0 has been subnetted to accommodate five subnets. Which of the following IP addresses could be assigned to a host in the third subnet if no ip subnet zero command configured on the router? A. 172.25.16.53 B. 172.25.24.1 C. 172.25.45.168 D. 172.25.62.255 E. 172.25.96.1 F. 172.25.118.194 答案:f An administrator needs ensur that any unauthorized individual trying to remotely access the router CLI will be presented whih an appropriate warning.Which command will accomplish this requirement? a.router#incoming banner motd b.router#banner motd c.router(config)#banner motd d.router(config-line)#banner motd e.router(config-line)#motd banner f.router(config-ling)#banner incoming answer:c 一个访问控制列表的问题就是给你两主机,中间连两个交换机 交换机的中间是 一个ROUTER , ROUTER 的左右两边的口分别是 E0 和 E1 然后告诉你 如何不让 左边的访问右边的主机,而其他的访问可以正常 选两个 给了 四个答案 A IP ACCESS-GROUP 98 OUT B IP ACCESS-GROUP 98 IN C IP ACCES-LIST 98 DENY HOST ( 右边的机器IP) PERMIT ANY D IP ACCESS-LIST 98 DENY HOST (左边的机器IP) PERMIT AN Y 这个题应该该选A D (在别人的战报里是AC其实都是一样的,只是我们的选项位置不一样) three routers all configuration complete and issue " COPY RUN START " command , then reload the IOS show always default blank, what could be the posible situation: answer : (a) IOS damaged (b) nvram damage (c) congigure register incorrect 答案是 b 这题我记得很清楚!!当时战报里有说选c的,但是我拿到题仔细了想了两分钟(这道题是我作的时间最常的一道题)决定选B!!不然的话俺就考不了1000了呀-_-!! 我感觉如果是congigure register incorrect 出错的话那一定是启动顺序发生问题。但是默认会从ROM里启动一般会进setup mode 但是题上说的是空白没有说进setup mode 。如果说进setup模式的话一定选c但是题没有讲,而是空白。所以俺坚决的选了b!以后考的人要注意了呀-- 又一个 1 .what are three advantages for VLANs?(three) A . VLANs establish broadcast domains in switched networks. B. VLANs utilize packet filtering to enhance network security C. VLANS provide a method of conserving ip addresses in large networks D. vlans provide a low-latency internetworking alternative to routed networks E. VLANs allow access to network services based on department, not physical location F. vlans can greatly simplify adding, moving, or changing hosts on the network 选AEF 2. which of the following correctly describe steps in the OSI data encapsulation process?(choose two) a. the transport layer divides a data stream into segments and adds reliability and flow control information b. the data link layer adds physical source and destination address and an FCS to the segment c. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocols-related control information d. packets are created when the network layer adds layer 3 address and control information to a segment e. the presentation layer translates bits into voltage for transmission across the physical link 选ad 3. 两个router,是stub的网络,相连的端口都up,但在一台router上用扩展ping却ping不同,问可能是那几个问题。 a:配置了不同的routing protocols b:routing protocols的配置是错误的 c: 端口的封装类型不同 d; 端口的ip配置错误 e:没有配置静态路由 答案DE 4. 一道新题.给了一个图,两个路由器相连,中间给出一个标准"TIA/EIA-232,V.35,X.21,HSST,OTHER",问你这几个说的是OSI那一层的。 我不知道答案,大家讨论。---------答案是: 物理层! 5. After configuring the routers on a stub network and ensuring that no ports are administratively shutdown, connectivity is tested with the extended ping command and fails. What could be the cause? (Choose two.) A. The serial ports have conflicting encapsulations. B. The wrong AS number is specified for the routing protocol C. The IP host section was not configured. D. The wrong routing protocol was configured on both routers. E. The wrong IP address was assigned to a serial interface. F. The static route was not configured 答案:EF 6. which of the following are functions of the frame relay local management interface ? (TWO) A. informs the router of congestion occurring on the link B. creates a virtual interface that receives frame relay traffic on the router C transmits keep alive packets to ensure the PVC stays active D. provides the router with the active DLCI connections E. allow the router to assign a DLCI to a router interface 选cd 7. Which of the following are benefits of VLANs?(choose three) A. They increase the size of collision domains. B. They allow logical grouping of users by function. C. They can enhance network security. D. They increase the size of broadcast domains while decreasing the number of broadcast domains E. They increase the number of broadcast domains while decreasing their size. F. They simplify switch administration. Answer: BCE 8. IP in which layer according to OSI network layers? A. application B. internet C. network D. transparent E. transport Answer: b 9. Which are valid modes for a switch port used as a VLAN trunk? (Choose three.) A. transparent B. auto C. on D. desirable E. blocking F. forwarding Answer: B C D 10. configure an addition ip host address for a physical layer, which command is true?(多选,) b. (config)#int e0 (congfig-if)#ip address 172.20.20.32 255.255.255.252 secondary e..(config)#int s0 (congfig-if)#ip address 172.20.20.32 255.255.255.252 secondary 答案: B E 11.which of the following makes monitoring and managing a distribution layer router simpler?(3) A. assign a static route B. add description to interface C. use subnet zero D, use a host naming convention E. create a banner motd 答案:B,D,E 12. which command is use for back of default cdp update time?(大概意思就是这样) A cdp timer 60 B cdp timer 30 C hold time 60 D hold time 90 答案:A 13. 这道变形题,很重要,大家注意,和TK 353很像,不过两台路由器名字不一样.(TK那道正是因为两台机器名字一样,所以协议DOWN, LCP OFF) 两个路由器PPP 连接,参数如下,问结果 HOSTNAME ASD ------------------ PPP 封装 CLOCK RATE 56000 HOSTNAME HOST B ---------------- PPP 封装 (少这一项) (其实与TK 353差不多,只是hostname不同.而且密码的大小写也是不同) A. interface UP, protocol UP B. interface UP, protocol DOWN C. LCP open D. LCP closed 答案:BD. 14. Which of the following are key characteristics of PPP?(Choose three) A. Can be used over analog circuits B. Maps layer 2 to Layer 3 address C. Encapsulates several routed protocols D. Supports IP only E. Provides error correction 答案:ACE 15. 在ISDN中,TE2的功能相当于 a. PC b. A ROUTER SERIAL INTERFACE 答案:a b 16. You would like to be able to make a backup copy of your IOS that is stored on your router. Which of the following commands can you use so that the router will become a TFTP host so that it can save the IOS to a TFTP server? A. Copy flash tftp B. Config tftp server C. Write network D. Tftp-server system E. Setup server tftp 答案 D 17. What information can be gained while troubleshooting when usingcommands associated with the Cisco Discovery Protocol? (Choose three.) A. IP addresses assigned to a neighboring Cisco router B. makes and models of all neighboring routers C. version of IOS running on each neighboring Cisco device D. bridging loops and blocked ports on Catalyst switches E. VPN assignments on Catalyst switches F. model numbers of connected Cisco devices. 答案:acf 18.which distance vector characteristic can help to speed up convergence ? a.split horizon b.poison reverse c.hold down timers d.triggered updatas e.inverse arp 答案: d 19. After configuring the routers on a stub network and ensuring that no ports are administratively shutdown, connectivity is tested with the extended ping command and fails. What could be the cause? (Choose two.) A. The serial ports have conflicting encapsulations. B. The wrong AS number is specified for the routing protocol C. The IP host section was not configured. D. The wrong routing proto E. The wrong IP address was assigned to a serial interface. F. The static route was not configured 答案: EF 20. a network administrator entered commands to define and to apply access list 173 to prevent telnet and icmp access to a server with the address of 192.168.13.26.which commands should the administrator issue to verify that the access list is working properly?(choose two) a ping 192.168.13.26 b debug access-list 173 c show open ports 192.168.13.26 d show access-list e show access list 173 f show ip interface 答案:AF 21. In 100BaseT Ethernet cabling 100 is the speed in Mbps, and T is the Type of Media in this case Twisted-Pair. What does the term ‘Base’ refer to? A. Cabling type. B. Signaling type. C. 100 mode type. D. Spectrum used. E. Speed category. Answer: B 原题不是这样的答案比较长,但是问的就是BASE的意思!!! 22. How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates? A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface. B.Configure each Frame Relay Circuit as a point-to-point line to support multicast and broadcast traffic. C.configure many sub-interface on the same subnet. D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interface. Answer:A 23. Which of the following are characteristics of microsegmention?(choose two) A. Dedicted paths between sending angg receiving hosts are estblished. B. Broadcast domains are enlarged. C. Multiple subnetwork broadcast adresses are created. D. multiple ARP tables are required on the connected hosts. E. Bandwidth is dedicated to connected hosts. Answer: A,E 23.The network 172.25.0.0 has been subnetted to accommodate five subnets. Which of the following IP addresses could be assigned to a host in the third subnet if no ip subnet zero command configured on the router? A. 172.25.16.53 B. 172.25.24.1 C. 172.25.45.168 D. 172.25.62.255 E. 172.25.96.1 F. 172.25.118.194 答案: F 我觉得EF这两个都是对的... 24. three different occasions an administrator configured a router,and after testing the configuration saved it to ..m by issuing the copy running-config startup-config command.After each successful save the administrator .. the reload command Each time when the router restarted,the router appeared to have the default blank ..uration. what could cause such results? A. The boot system commands were left out of the configuration B.The NVRAM is corrupted C.The configutation register setting is incorred D.The upgraded IOS just loaded is not compatible with the hardware E.THe upgraded configuration is not compatible with the hardware 答案:c 25. 两个路由分别连接两个交换机,交换机下面还有两个主机:host1和host2 其中一个路由地址为a 10.1.34.45/22,另外一个为b 10.1.34.255/22,他们不能互相通信什么原因? a The ethernet1 interface has been assigned a broadcast address b the ethernet1 interface is not assigned aunique network number c host2 has been assigned the gateway subnet mask 255.255.254.0 d host1 has been configured with 255.255.252.0 as the gateway subnet mask e the ethernet0 adn ethernet1 interface are unique network number 答案是:BC 解释:A错在10.1.34.255/22这个是主机地址,不是广播地址(注意这个是A类地址) 关于E选项的:因为图给的是两个路由器,2个路由器用的都是E1口连HOST...而E答案说的是E0和E1不是在一个unique的netwok number里面.. 所以这题根本就没有E0口,E选项当然也是错的~(可能弄战报的人没记清楚吧) 26. 一个访问控制列表的问题就是给你两主机,中间连两个交换机 交换机的中间是一个ROUTER , ROUTER 的左右两边的口分别是 E0 和 E1 然后告诉你 如何不让左边的访问右边的主机,而其他的访问可以正常 选两个给了 四个答案 A IP ACCESS-GROUP 98 OUT B IP ACCESS-GROUP 98 IN C IP ACCESS-LIST 98 DENY HOST (左边的机器IP) PERMIT ANY D IP ACCES-LIST 98 DENY HOST ( 右边的机器IP) PERMIT ANY 答案: A C 27.An administrator needs ensur that any unauthorized individual trying to remotely access the router CLI will be presented whih an appropriate warning.Which command will accomplish this requirement? a.router#incoming banner motd b.router#banner motd c.router(config)#banner motd d.router(config-line)#banner motd e.router(config-line)#motd banner f.router(config-ling)#banner incoming 答案: c 28.if an ethernet port on a router was assigned an IP address of 172.16.112.1/20,what is the maximum number of hosts allowed on this subnet? a.1024 b.2046 c.4094 d.4096 e.8190 答案:C
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