CCNA題庫第一部分

1、Which technology supports the stateless assignment of IPv6 addresses?(Choose two.)

哪些技術支援無狀态任務的IPv6位址？（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?

在配置環回接口後，哪一個指令可以證明其接口狀态和決定是否快速交換開啟？（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?

建立VLAN20，并且把端口劃分進VLAN20的指令是什麼？（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-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 p_w_picpath? (Choose three.)

哪三個指令是設定路由器啟動鏡像？（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.)

哪兩個關于IPV6和路由協定是正确的？（BE）

本題用排除法做

A. EIGRPv3 was developed to support IPv6 routing.//EIGRP沒有EIGRPV3

B. OSPFv3 was developed to support IPv6 routing. //正确

C. Loopback addresses are used to form routing adjacencies.//環回口不是形成路由鄰居

D. EIGRP, OSPF, and BGP are the only routing protocols that support IPv6. //他們也支援IPV4

E. Link-local addresses are used to form routing adjacencies. //正确

6、Which two statements about late collisions are true? (Choose two.)

關于遲碰撞的說法正确的有？（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?

哪一個指令用于在一個接口下設定所有的預設路由？（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?

如果一個路由器有4個接口，每一個接口下有4台交換機，在路由器上有多少個廣播域？（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，哪一個指令可以進入ipv6的轉發？（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?

哪一個指令用于在接入層阻止使用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