CCNA题库V3.0选择题

1. 备忘 选择题 l 题目原有编号不变：基于网络流传的题库编号不变，方便大家查找比对 l 按照技术分组：比如ospf一组， RIP一组， 便于对照分析，可以快速掌握一组题目，举一反三，相关知识点全部掌握 l 叙述复杂的，给大家提供汉语译文，简单的一般直接用英文题目，有利于锻炼大家的英文阅读能力 本题库是CCNA V3.0（200-125）的最新题库,覆盖约95%以上. ★根据国内外论坛战报,更新了83道选择题,5道拖图题和8道实验题. ★大大优化了图片质量,很多模糊的图片都完全重新制作! 2. 题库 2.1. IPv6 2.1.1. QUESTION 1 Which technology supports the stateless assignment of IPv6 addresses?(Choose two.) A.DNS B.DHCPv6 C.DHCP D.Autoconfiguration Correct Answer: BD Section: part 1 Explanation Explanation/Reference:哪种技术支持IPv6地址的无状态分配 1.1.1. QUESTION 6 Which two statements about IPv6 and routing protocols are true? (Choose two.) A.EIGRPv3 was developed to support IPv6 routing. B.OSPFv3 was developed to support IPv6 routing. C.Loopback addresses are used to routing adjacencies. D.EIGRP, OSPF, and BGP are the only routing protocols that support IPv6. E.Link-local addresses are used to routing adjacencies. Correct Answer: BE Section: part 1 Explanation Explanation/Reference: B（OSPFv3是为了IPv6开发的） E（链路本地地址用于路由邻接表。） 1.1.1. QUESTION 12 Which command enables IPv6 forwarding on a cisco router? A.ipv6 host B.ipv6 unicast-routing C.ipv6 local D.ipv6 neighbor Correct Answer: B Section: part 1 Explanation Explanation/Reference: 在路由器上激活IPv6的命令 1.2. 接口 1.2.1. QUESTION 2 After you configure the Loopback0 interface, which command can you enter to verify the status of the interface and determine whether fast switching is enabled? A.Router#show ip interface loopback 0 B.Router#show run C.Router#show interface loopback 0 D.Router#show ip interface brief Correct Answer: A Section: part 1 Explanation Explanation/Reference:在配置界面，哪个命令你可以输入验证接口的状态和确定是否启用快速切换？ 1.3. HSRP 1.3.1. QUESTION 3 ? What are two requirements for an HSRP group? (Choose two.) A.exactly one active router（一个主动路由） B.one or more standby routers C.one or more backup virtual routers D.exactly one standby active router（备用主动路由） E.exactly one backup virtual router Correct Answer: AD Section: part 1 Explanation Explanation/Reference:一个HSRP组的要求是什么？ 1.4. VLAN 1.4.1. QUESTION 4 Which command sequence can you enter to create VLAN 20 and assign it to an interface on a switch? A. Switch(config)#vlan 20 Switch(config)#Interface gig x/y Switch(config-if)#switchport access vlan 20 B. Switch(config)#Interface gig x/y Switch(config-if)#vlan 20 Switch(config-vlan)#switchport access vlan 20 C. Switch(config)#vlan 20 Switch(config)#Interface vlan 20 Switch(config-if)#switchport trunk native vlan 20 D. Switch(config)#vlan 20 Switch(config)#Interface vlan 20 Switch(config-if)#switchport access vlan 20 E. Switch(config)#vlan 20 Switch(config)#Interface vlan 20 Switch(config-if)#switchport trunk allowed vlan 20 Correct Answer: A Section: part 1 Explanation Explanation/Reference:创建VLAN 20并将其分配给交换机上的接口 1.1.1. QUESTION 27 What are three advantages of VLANs? (Choose three.) A.They establish broadcast domains in switched networks.