QUESTION 35
Which two features did WPAv1 add to address the inherent weaknesses found in WEP? (Choose two.)
A. a stronger encryption algorithm B. key mixing using temporal keys C. shared key authentication D. a shorter initialization vector E. per frame sequence counters Answer: BE
Section: Chapter 11: Wireless Explanation/Reference:
考点：WPA1中增强哪两个在WEP中发现的弱点？WEP存在的隐患主要是依赖共享密钥 A：更强的加密算法 B：混合使用的密钥 C：共享密钥认证
D：较短的初始化向量
E：一个帧一个序列计数器。
QUESTION 36
Which two wireless encryption methods are based on the RC4 encryption algorithm? (Choose two.) A. WEP B. CCKM C. AES D. TKIP E. CCMP Answer: AD
Section: Chapter 11: Wireless Explanation/Reference:
考点：哪两种无限加密技术依赖RC A:有线等效保密协议 B：英特尔开发一种协议 C：高级加密标准
D：暂时密钥集成协议 E:基于AES的加密方式
QUESTION 37
What are two characteristics of RIPv2? (Choose two.) A. classful routing protocol
B. variable-length subnet masks C. broadcast addressing
D. manual route summarization
E. uses SPF algorithm to compute path Answer: BD
Section: Chapter 6: IP Routing Explanation/Reference: A：有类路由协议，错误 B：可变长度子网掩码，正确 C：采用广播地址更新，错误 D：手动路由汇总，正确
E:使用spf算法计算路径，错误。
QUESTION 38
Which two Ethernet fiber-optic modes support distances of greater than 550 meters? A. 1000BASE-CX B. 100BASE-FX C. 1000BASE-LX D. 1000BASE-SX E. 1000BASE-ZX Answer: CE
Section: Chapter 1: Introduction Explanation/Reference: A：最长距离25米 B：最长距离100米 C：最长距离3000米 D：最长距离550米 E：最长距离70千米
QUESTION 39
What two things will a router do when running a distance vector routing protocol? (Choose two.) A. Send periodic updates regardless of topology changes.
B. Send entire routing table to all routers in the routing domain. C. Use the shortest-path algorithm to the determine best path. D. Update the routing table based on updates from their neighbors. E. Maintain the topology of the entire network in its database. Answer: AD
Section: Chapter 6: IP Routing Explanation/Reference:
考点：考查距离矢量路由协议特性 A：周期性更新，正确
B：发送整个路由表到整个路由域，错误，只发送 C：使用SPF算法，错误
D：依靠邻居发送更新来更新路由表，正确 E：在数据库中维护整个网络的拓扑。错误
QUESTION 40
Refer to the exhibit. According to the routing table, where will the router send a packet destined for10.1.5.65?
A. 10.1.1.2 B. 10.1.2.2 C. 10.1.3.3 D. 10.1.4.4 Answer: C
Section: Chapter 6: IP Routing Explanation/Reference:
路由查找原则：最长掩码匹配原则。
QUESTION 41
Which command shows if an access list is assigned to an interface? A. show ip interface [interface] access-lists B. show ip access-lists interface [interface] C. show ip interface [interface] D. show ip access-lists [interface] Answer: C
Section: Chapter 7: Security Explanation/Reference:
QUESTION 42
Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?
A. The address is removed from the pool until the conflict is resolved. B. The address remains in the pool until the conflict is resolved.
C. Only the IP detected by Gratuitous ARP is removed from the pool. D. Only the IP detected by Ping is removed from the pool. E. The IP will be shown, even after the conflict is resolved.
Answer: A
Section: Chapter 5: Managing Cisco IOS Explanation/Reference:
show ip dhcp conflict命令可以查看哪些ip地址在使用上 有冲突的地址不再分配出去。
A：地址被删除直到冲突解决，正确 B:地址保留直到冲突解决，错误 C/D：答案片面。
E：当冲突解决后，地址会被显示。错误。
QUESTION 43
Refer to the exhibit. You are connected to the router as user Mike. Which command allows you to see
output from the OSPF debug command?
A. terminal monitor B. show debugging C. show sessions
D. show ip ospf interface Answer: A
Section: Chapter 6: IP Routing Explanation/Reference:
A：让debug信息在终端上显示出来 B：没这条命令 C：查看会话信息。
D:查看启用了ospf的接口的相关信息。
QUESTION 44
Refer to the exhibit. If number 2 is selected from the setup script, what happens when the user runs setup
from a privileged prompt?
A. Setup is additive and any changes will be added to the config script.
