1、Which technology supports the stateless assignment of IPv6 addresses?(Choose two.)
哪些技术支持无状态任务的IPv6地址？（BD）
A. DNS
B. DHCPv6
C. DHCP
D. autoconfiguration
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?
在配置环回接口后，哪一个命令可以证实其接口状态和决定是否快速交换开启？（A）
A.Router#show ip interface loopback 0
B.Router#show run
C. Router#show interface loopback 0
D. Router#show ip interface brief
3、Which command sequence can you enter to create VLAN 20 and assign it to an interface
on a switch?
创建VLAN20，并且把端口划分进VLAN20的命令是什么？（A）
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
4、Which three commands can you use to set a router boot image? (Choose three.)
哪三个命令是设置路由器启动镜像？（ABC）
技巧：boot system (flash/tftp/rom)
A.Router(config)# boot system flash c4500-p-mz.121-20.bin
B.Router(config)# boot system tftp c7300-js-mz.122-33.SB8a.bin
C. Router(config)#boot system rom c7301-advipservicesk9-mz.124-24.T4.bin
D. Router> boot flash:c180x-adventerprisek9-mz-124-6T.bin
E.Router(config)#boot flash:c180x-adventerprisek9-mz-124-6T.bin
F.Router(config)#boot bootldr bootflash:c4500-jk9s-mz.122-23f.bin
5、Which two statements about IPv6 and routing protocols are true? (Choose two.)
哪两个关于IPV6和路由协议是正确的？（BE）
本题用排除法做
A. EIGRPv3 was developed to support IPv6 routing.//EIGRP没有EIGRPV3
B. OSPFv3 was developed to support IPv6 routing. //正确
C. Loopback addresses are used to form routing adjacencies.//环回口不是形成路由邻居
D. EIGRP, OSPF, and BGP are the only routing protocols that support IPv6. //他们也支持IPV4
E. Link-local addresses are used to form routing adjacencies. //正确
6、Which two statements about late collisions are true? (Choose two.)
关于迟碰撞的说法正确的有？（AB）
A.They may indicate a duplex mismatch.
B.By definition, they occur after the 512th bit of the frame has been transmitted.
C.They indicate received frames that did not pass the FCS match.
D.They are frames that exceed 1518 bytes.
E.They occur when CRC errors and interference occur on the cable.
7、Which command can you enter to set the default route for all traffic to an interface?
哪一个命令用于在一个接口下设置所有的默认路由？（A）
A.router(config)#ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1
B.router(config)#ip route 0.0.0.0 255.255.255.255 GigabitEthernet0/1
C. router(config-router)#default-information originate
D. router(config-router)#default-information originate always
8、If a router has four interfaces and each interface is connected to four switches, how
many broadcast domains are present on the router?
如果一个路由器有4个接口，每一个接口下有4台交换机，在路由器上有多少个广播域？（C）
A. 1
B. 2
C. 4
D. 8
9、Which command enables IPv6 forwarding on a cisco router?
在思科路由器上，哪一个命令可以进入ipv6的转发？（B）
A. ipv6 host
B. ipv6 unicast-routing
C. ipv6 local
D. ipv6 neighbor
10、Which set of commands is recommended to prevent the use of a hub in the access layer?
哪一个命令用于在接入层阻止使用hub？（C）
A. switch(config-if)#switchport mode trunk
switch(config-if)#switchport port-security maximum 1
B. switch(config-if)#switchport mode trunk
switch(config-if)#switchport port-security mac-address 1
C. switch(config-if)#switchport mode access
switch(config-if)#switchport port-security maximum 1
D. switch(config-if)#switchport mode access
switch(config-if)#switchport port-security mac-address 1