- 最后登录
- 2009-7-29
- 在线时间
- 0 小时
- 金币
- 0
- 注册时间
- 2009-7-29
- 阅读权限
- 10
- 帖子
- 33
- 精华
- 0
- 积分
- 100
- UID
- 24606

该用户从未签到 - 最后登录
- 2009-7-29
- 在线时间
- 0 小时
- 金币
- 0
- 注册时间
- 2009-7-29
- 阅读权限
- 10
- 帖子
- 33
- 精华
- 0
- 积分
- 100
- UID
- 24606
|
发表于 2009-7-29 16:37:28
|显示全部楼层

CCNA640-802 V12题库试题分析6(艾迪飞吴老师讲解)
1. While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist?
A. the session layer
B. the protocol layer
C. the data link layer
D. the access layer
E. the network layer
F. the application layer
Answer: E
以下内容需要回复才能看到
解释一下:PING命令是3层的应用,他利用的是ICMP协议的两个报文:echo,echo-replay。
2.A network administrator has configured two switches, named London and Madrid, to use VTP. However, the switches are not sharing VTP messages. Given the command output shown in the graphic, why are these switches not sharing VTP messages?
2.jpg (26.85 KB)
2007-11-15 13:48
A. The VTP version is not correctly configured.
B. The VTP operating mode is not correctly configured.
C. The VTP domain name is not correctly configured.
D. VTP pruning mode is disabled.
E. VTP V2 mode is disabled.
F. VTP traps generation is disabled.
Answer: C
解释一下:交换机间不能共享VTP的信息,我们就需要检查VTP的状态,首先需要检查的是VTP的域名,只有同一个域中的才可能相互学习,再来检查VTP的模式,必须有一个server模式才能有VTP学习的过程的,默认的情况下VTP的模式为Server的。然后我们检查图题目给出的信息,可以看到两台交换机的VTP domain是不一致的,所以这个就是问题的所在了。
3.In order to allow the establishment of a Telnet session with a router, which set of commands must be configured?
A. router(config)# line console 0
router(config-line)# enable password cisco
B. router(config)# line console 0
router(config-line)# enable secret cisco
router(config-line)# login
C. router(config)# line console 0
router(config-line)# password cisco
router(config-line)# login
D. router(config)# line vty 0
router(config-line)# enable password cisco
E. router(config)# line vty 0
router(config-line)# enable secret cisco
router(config-line)# login
F. router(config)# line vty 0
router(config-line)# password cisco
router(config-line)# login
Answer: F
解释一下:telnet是一个应用层的应用,他使用的是vty线路,而且在默认的情况下,是需要访问的线路下设有密码的。而在VTY线路下设置密码的命令为 passwork string ,而VTY线路下的另一个命令login则是默认的,可写也可不写。如果想Telnet时在VTY线路下不设置密码也可以访问这个线路,可以在该VTY线路下输入命令 no login。
4. Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true? (Choose two.)
4.jpg (22.92 KB)
2007-11-15 13:48
A. Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.
B. Router C will use ICMP to inform Router B that Host 2 cannot be reached.
C. Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached.
D. Router C will send a Destination Unreachable message type.
E. Router C will send a Router Selection message type.
F. Router C will send a Source Quench message type.
Answer: AD
解释一下:连Host 2的接口E0/0 down了,那么最直接的反映就发生在路由器C上,C的路由表中的这个条目就消失了,因此当Host 1 想要跟Host 2建立连接的时候,Router C就发送一个目的网段不可达的消息;如果是使用ping命令,那么Router C就使用ICMP 的包文告诉Host 1,Host 2是不可打的。
5.Refer to the exhibit. Assuming that the router is configured with the default settings, what type of router interface is this?
5.jpg (21.66 KB)
2007-11-15 13:48
A. Ethernet
B. FastEthernet
C. Gigabit Ethernet
D. asynchronous serial
E. synchronous serial
Answer: B
解释一下:这个题是需要根据图中提供的信息来判断接口的类型。可以看到接口的MAC地址,表示这个接口肯定不是串行接口,所以可以排除D和E的选项。看带宽BW 100000 Kbit,表示的是100M的带宽,所以这是个Fast Ethernet接口。 |
|