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A router has two FastEthernet in

题目

A router has two FastEthernet interfaces and needs to connect to four vlans in the local network.How can you accomplish this task，using the fewest physical interfaces and without decreasing networkper formance？（）

  • A、Add two more FastEthernet interfaces.
  • B、Add a second router to handle the vlan traffic.
  • C、Use a hub to connect the four vlans with a FastEthernet interface on router.
  • D、Implement a router-on-a-stick configuration.
参考答案和解析
正确答案:D
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相似问题和答案

第1题：

Refer to the exhibit. Which two statements are true about the partial configuration that is shown? ()

A. The first DHCP client to connect to the FastEthernet 0/1 interface will receive the IP address 10.10.0.1.

B. DHCP requests received on the FastEthernet 0/1 interface will be forwarded to 10.0.0.2.

C. The first DHCP client to connect to the FastEthernet 0/0 interface will receive the IP a ddress 10.0.0.1

D. The first DHCP client to connect to the FastEthernet 0/0 interface will receive the IP address 10.0.0.6.

E. Hosts connected to the FastEthernet0/1 interface will not receive DHCP replies from the router.


参考答案：D, E

第2题：

A company has a small network,consisting of a single switch and a single router.The switch has been configured with two vlans,and route-on-a-stick is being configured on the router for inter-vlan routing.A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate?（）

A. one

B. three

C. two

D. zero


参考答案：C

第3题：

阅读路由器Router的部分配置信息，解释(5)～(7)处的命令，将答案填写在答题纸上相应的位置。

Router(config)interface fastEthernet1/0.1

Router(config-subif)encapsulation isl 11 (5)

Router(config-subif)ip addreSs 192.168.1.1 255.255.255.240 (6)

Router(config-subif)exit

Router(config)interface fastEthernet1/0.2

Router(config-subif)encapsulation isl 12

Router(config-subif)ip address 192.168.1.33 255.255.255.224

Router(config-subif)exit

Router(config)interface fastEthernet1/0.3

Router(config-subif)encapsulation isl 13

Router(config-subif)ip address 192.168.1.129 255.255.255.192

Router(config-subif)exit

Router(config)ip routing (7)


正确答案：(5)设置子接口fastEthernet1/0.1接收VLAN 11的数据trunk的数据封装协议isl (6)配置子接口fastEthemet1/0.1的IP地址和子网掩码 (7)启动路由配置如果无这条命令将导致路由配置无效
(5)设置子接口fastEthernet1/0.1接收VLAN 11的数据，trunk的数据封装协议isl (6)配置子接口fastEthemet1/0.1的IP地址和子网掩码 (7)启动路由配置，如果无这条命令，将导致路由配置无效 解析：这部分的配置是使独臂路由器完成各VLAN之间的数据转发。独臂路由器，是指只用一个接口模拟多个接口工作，来完成VLAN之间的数据转发。实现方法是在一个接口中创建多个子接口，让各个子接口只接收和发送某一VLAN的数据。(5)和(6)处就是设置子接口fastEthernet1/0.1接收哪一个VLAN数据及数据封装协议，并指定该VLAN的的默认网关和子网掩码。命令“ip routing”的作用是启动路由配置，如果无这条命令，将导致路由配置无效。

第4题：

A company has a Frame Relay WAN with one central - site router and 100 branch office routers. A partial mesh of PVCs exists: one PVC between the central site and each of t he 100 branch routers. All routers use point - to - point subinterfaces and one subnet per PVC. Which of the following is true about OSPF in this design?（）

  • A、The central site router has 100 fully adjacent neighborships with the 100 branches
  • B、The central  site router has neighborships with all branch routers, but fully adjacent neighbors with only two branches
  • C、The central site router has a neighborship with the Frame Relay switcH
  • D、None of the other answers is correct

正确答案:A

第5题：

Refer to the exhibit. For what two reasons has the router loaded its IOS image from the location that is shown? ()

A.Router1 has specific boot system command that instruct it to load IOS from TFTP server.

B.Router1 is acting as a TFTP server for other routers.

C.Router1 cannot locate a valid IOS image in flash memory.

D.Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server.

E.Cisco routers will first attempt to load a image from TFTP for management purposes.


参考答案：A, C

第6题：

Refer to the exhibit. What two statements are true?()

A. This is the designated router (DR) on the FastEthernet 0/0 link.

B. The output was generated by the show ip interface c ommand.

C. The router was configured with the commands:r outer ospf 1 network 172.16.6.0 0.0.0.255 area 1

D. The IP address of the backup designated router (BDR) is FE80::205:5FFF:FED3:5808.

E. Interface FastEthernet 0/0 was configured with the ipv6 o spf 1 area 1 command.

F. OSPF version 2 has been enabled to support IPv6.


参考答案：D, E

第7题：

Which two commands correctly verify whether port security has been configured on port FastEthernet 0／12 on a switch?()

A. SW1#show swithport port-security interface FastEthernet 0/12

B. SW1# show swithport port-secure interface FastEthernet 0/12

C. SW1# show port-secure interface FastEthernet 0/12

D. SW1#show running-config

E. SW1#show port-security interface FastEthernet 0/12


参考答案：D, E

第8题：

Which two conditions, when met, allow an IS－IS Level 2 router to be considered attached?()

A. You can reach other Level 2 routers.

B. It can reach at least one other defined area.

C. The router is reachable by at least two ES-IS nodes.

D. It has at least one enabled reachable prefix with a valid metric defined.


参考答案：B, D

第9题：

Which two commands correctly verify whether port security has been configured on port FastEthernet0/12 on a switch？（）

  • A、SW1#shows withport port-security interface FastEthernet0/12
  • B、SW1#shows withport port-secure interface FastEthernet0/12
  • C、SW1#show port-secure interface FastEthernet0/12
  • D、SW1#show running-config

正确答案:C,D

第10题：

A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

  • A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.
  • B、For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.
  • C、Direct inter-vlan communication does not require OSPF
  • D、OSPF cannot be used if router-on-a-stick is configured on the router

正确答案:C

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