tk78 后面没有答案的题，偶做出了一些，请高手更正！！

single · 发表于 2005-8-27 18:00:34

QUESTION NO: 5 What does a Layer 2 switch do if it receives a frame with destination MAC address that is not found in its MAC address table? A. The frame is dropped. B. The frame is addressed with a broadcast MAC address and sent out all ports. C. The frame is sent out all ports except the receiving port. D. An ARP request is sent out all ports except the receiving port. E. A destination unreachable message is sent back to the source address. Answer:B What does a Layer 2 switch use to decide where to forward a received frame? A. source MAC addressB. source IP address C. source switch port D. destination IP address E. destination port address F. destination MAC addressf

single · 发表于 2005-8-27 18:02:16

QUESTION NO: 7 What are the possible trunking modes for a switch port? (Choose three.) A. transparent B. auto C. on D. desirable E. client F. forwarding Answer: B C D  A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch? A. BPDU B. Port security C. RSTP D. STP E. VTP F. Blocking mode Answer:B  QUESTION NO: 9 A CCNA candidate is working on a 2600 Cisco router. The person needs to verify that the configuration register is set to boot the router IOS from flash memory and use the commands saved in the startup-configuration file. Which command will display this information, and what is the configuration register value that should be displayed? A. show startup-configand 0x2142 B. show versionand 0x2102 C. show flashand 0x2102 D. show versionand 0x2142 E. show running-configand 0x2142 F. show flashand 0x2142 Answer:B QUESTION QUESTION NO: 10 Which wild card mask will enable a network administrator to permit access to the Internet for only hosts that are assigned an address in the range 192.168.8.0 through 192.168.15.255? A. 0.0.0.0 B. 0.0.0.255 C. 0.0.255.255 D. 0.0.7.255 E. 0.0.3.255 Answer:DA workgroup switch is configured with all ports assigned to VLAN2. Inaddition, all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch? A. The additions will create more collision domains. B. IP address utilization will be more efficient. C. More bandwidth will be required than was needed previously. D. An additional broadcast domain will be created. E. The possibility that switching loops will occur will increase dramatically. Answer: D Explanation: 88888*****************************Which ISDN device converts the four-wire BRI signals from an S/T interface into the two-wire signals of a U interface? A. TE1 B. NT-2 C. TA D. TE2 E. NT-1 Answer: E

王晓强 · 发表于 2005-8-28 18:45:23

QUESTION NO: 5 What does a Layer 2 switch do if it receives a frame with destination MAC address that is not found in its MAC address table? A. The frame is dropped. B. The frame is addressed with a broadcast MAC address and sent out all ports. C. The frame is sent out all ports except the receiving port. D. An ARP request is sent out all ports except the receiving port. E. A destination unreachable message is sent back to the source address. Answer:B 这是考查第2层交换三种不同功能。转发/过滤决定和地址学习功能：如果收到的帧的目的地址没有被列在MAC数据库中，帧就被广播到除了发送帧的接口以外的所有其他活动接口上。因此这题应该选择C.QUESTION NO: 6 What does a Layer 2 switch use to decide where to forward a received frame? A. source MAC address B. source IP address C. source switch port D. destination IP address E. destination port address F. destination MAC address Answer: F 这是考查第2层交换三种不同功能。转发/过滤决定功能：当在某个接口上收到帧时，交换机就会查看其目的硬件地址，并在MAC数据库中找到其外出的接口。帧只被转发到指定的目的的端口。the answer is right。 有关知识可以在NA书本P259～261查看。QUESTION NO: 7 What are the possible trunking modes for a switch port? (Choose three.) A. transparent B. auto C. on D. desirable E. client F. forwarding Answer: B C D 这题考查TRUNK的模式，有Auto，Desirable，Nonegotiate，Off，On这五种，the answer is right. 有关知识可以在NA书本P301查看。QUESTION NO: 8 A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch? A. BPDU B. Port security C. RSTP D. STP E. VTP F. Blocking mode Answer:B 这题考查端口安全，交换机可以配置使得只有某个MAC地址才能使用该端口，在bootcamp教材里有相关实验，the answer is right.其他的选项跟这个完全没关系！   QUESTION NO: 9 A CCNA candidate is working on a 2600 Cisco router. The person needs to verify that the configuration register is set to boot the router IOS from flash memory and use the commands saved in the startup-configuration file. Which command will display this information, and what is the configuration register value that should be displayed? A. show startup-configand 0x2142 B. show version and 0x2102 C. show flash and 0x2102 D. show version and 0x2142 E. show running-config and 0x2142 F. show flash and 0x2142 Answer:B the anser is ok.QUESTION NO: 10 Which wild card mask will enable a network administrator to permit access to the Internet for only hosts that are assigned an address in the range 192.168.8.0 through 192.168.15.255? A. 0.0.0.0 B. 0.0.0.255 C. 0.0.255.255 D. 0.0.7.255 E. 0.0.3.255 Answer:D 这题考查反掩码的计算，192.168.8.0 0.0.7.255->192.168.8.0~192.168.15.255,the answer is ok.QUESTION NO: 11 A workgroup switch is configured with all ports assigned to VLAN2. In addition, all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch? A. The additions will create more collision domains. B. IP address utilization will be more efficient. C. More bandwidth will be required than was needed previously. D. An additional broadcast domain will be created. E. The possibility that switching loops will occur will increase dramatically. Answer: D Explanation: 这题考查增加VLAN的影响，有关知识可以在NA书本P287查看。每个口都还是一个冲突域，会增加使用一个IP网段，带宽应该没有关系，交换环路也不会出现。the answer is ok.QUESTION NO: 12 Which ISDN device converts the four-wire BRI signals from an S/T interface into the two-wire signals of a U interface? A. TE1 B. NT-2 C. TA D. TE2 E. NT-1 Answer: E 有关知识可以在NA书本P405查看,the answer is ok.

sky-worm · 发表于 2005-8-28 22:05:53

恩,恩~!［此帖子已被 sky-worm 在 2005-8-28 22:39:54 编辑过］

single · 发表于 2005-8-30 12:33:19

<IMG src="http://www.spoto.net/bbs/images/Emotions/28.gif">thank  you  very much !!!!!

白杨 · 发表于 2005-9-3 11:23:36

我为andersen这种敬业的精神深深的感动!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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[讨论/求助] tk78&nbsp;后面没有答案的题，偶做出了一些，请高手更正！！

[讨论/求助] tk78 后面没有答案的题，偶做出了一些，请高手更正！！