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单选题What is the purpose of configuring router R1 with the "IP Helper address" command？（）A IP Helper is used to direct BOOTP clients to a BOOTP serverB IP Helper is used to prevent the router form forwarding IP broadcastsC IP Helper is used to allow IPX cli

题目
单选题
What is the purpose of configuring router R1 with the "IP Helper address" command？（）
A

IP Helper is used to direct BOOTP clients to a BOOTP server

B

IP Helper is used to prevent the router form forwarding IP broadcasts

C

IP Helper is used to allow IPX clients to communicate with IP-based servers

D

IP Helper is used to accommodate compatibility routers using different IP routing protocols

E

None of the other alternatives apply

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相似问题和答案

第1题：

Refer to the exhibit. EIGRP is configured on all routers in the network. On a basis of the show ip eigrp topology output provided, what conclusion can be deri ved? ()

A.Router R1 is waiting for a reply from the neighbor 10.1.2.1 to the hello message sent out inquiring for a second successor to network 10.6.1.0/24

B.Router R1 can send traffic destined for network 10.6.1.0/24 out of interface FastEthernet0/0

C.Router R1 is waiting for a reply from the neighbor 10.1.2.1 to the hello message sent out before it declares the neighbor unreachable

D.Router R1 is waiting for a reply from the neighbor 10.1.2.1 in response to the query sent out about network 10 .6.1.0/24


参考答案：D

第2题：

Refer to the exhibit. EIGRP has been configured on routers R1 and R2. However, R1 does not show R2 as a neighbor and does not accept routing updates from R2.What could be the cause of the problem?()

A. The no auto - summary command has not been issued under the EIGRP process on both routers.

B. Interface E0 on router R1 has not been configured with a secondary IP address of 10.1.2.1/24.

C. EIGRP cannot exchange routing updates with a neighbor‘s router interface that is configured with tw o IP addresses.

D. EIGRP cannot form neighbor relationship and exchange routing updates with a secondary address.


参考答案：D

第3题：

以下是路由器R1的部分配置，请完成其配置，或解释配置命令含义。

!

R1 (Config) interface fastethernet0

R1(Config-if) ip address (6) (7)

R1(Config-if) (8) (开启端口)

!

R1 (Config) interface serial 0

R1(Config-if) ip address (9) (10)

!

R1 (Config) ip routing

R1 (Config) router rip (11)

R1 (Config-router) (12) (声明网络)

R1 (Config-router) (13) (声明网络)

R1 (Config-router) (14) (声明网络)

R1 (Config-router) version 2 (15)

!


正确答案：(6)192.168.1.1 (7)255.255.255.0 (8)noshutdown (9)192.168.251.1 (10)255.255.255.0 (11)进入RIP配置模式 (12)network 192.168.1.0 (13)network 192.168.251.0 (14)network 192.168.253.0 (15)设置RIP协议版本2 注：(12)、(13)、(14)答案可互换
(6)192.168.1.1 (7)255.255.255.0 (8)noshutdown (9)192.168.251.1 (10)255.255.255.0 (11)进入RIP配置模式 (12)network 192.168.1.0 (13)network 192.168.251.0 (14)network 192.168.253.0 (15)设置RIP协议版本2 注：(12)、(13)、(14)答案可互换 解析：由上图可知，路由器R1的e0的地址为192.168.1.1/24，s0的地址为192.168.251.1/24，使用network命令声明网络，分别是192.168.1.0、192.168.251.0、192.168.253.0。所以其配置应如下。
!
R1(Config)#interface fastethernet0
R1(Config-if) #ip address192.168.1.1255.255.255.0
R1(Config-if)# noshutdown (开启端口),
!
R1(Config)#interface serial 0
R1(Config-if)# ip address 192.168.251.1 255.255.255.0
!
R1(Config)# ip routing
R1 (Config) #router rip(进入RIP配置模式)
R1(Config-router)# network 192.168.1.0(声明网络 192.168.1.0/24)
R1(Config-router)# network 192.168.251.0(声明网络 192.168.251.0/24)
R1(Config-router)# network 192.168.253.0(声明网络 192.168.253. 0/24)
R1(Config-router) #version 2 (设置RIP协议版本2)

第4题：

Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface. What command would make this router not use a DR and require static OSPF neighbor definition?（）

  • A、ip ospf network broadcast
  • B、ip ospf netw ork non - broadcast
  • C、ip ospf network point - to - multipoint
  • D、ip ospf network point - to - multipoint non - broadcast

正确答案:D

第5题：

When configuring a serial interface on a router, what is the default encapsulation?()

A. atm-dxi

B. frame-relay

C. hdlc

D. lapb

E. ppp


参考答案：C

第6题：

Refer to the exhibit. Router R1 is connected to networks 172.1 6.1.0 ／26 and 172.16.1.64 ／27. On the basis of the partial output in the exhibit, which statement is true? ()

A. Router R1 will deny the 172.16.1.0/26 route while permitting the 172.16.1.64/27 route to be advertised.

B. Router R1 will advertise both rou tes.

C. Router R1 should be reconfigured with an ACL instead of an ip prefix - list command.

D. Router R1 will deny the 172.16.1.0/27 route while permitting the 172.16.1.0/26 route to be advertised.


参考答案：D

第7题：

What is the reason for configuring a passive interface on a router?()

A. Allows interfaces to share common IP addresses.

B. Allows an interface to remain up without the aid of keepalives.

C. Allows a router to send routing and not receive updates via that interface.

D. Allows a routing protocol to forward updates that is missing its IP address.

E. Allows a router to receive routing updates on an interface but not send updates via that interface.


参考答案：E

第8题：

Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface.What command would make this router not use a DR, and dynamically discover OSPF neighbors?（）

A. ip ospf network broadcast

B. ip ospf network non - broadcast

C. ip ospf network point - to - multipoint

D. ip ospf network point - to - multipoint non - broadcast


参考答案：C

第9题：

Users on the 192.168.1.0／24 network must access files located on the Server 1. What route could be configured on router R1 for file requests to reach the server()。

A.ip route 0.0.0.0 0.0.0.0 s0/0/0

B.ip route 0.0.0.0 0.0.0.0 209.165.200.226

C.ip route 209.165.200.0 255.255.255.0 192.168.1.250

D.ip route 192.168.1.0 255.255.255.0 209.165.100.250


参考答案：A

第10题：

You administer a network that uses two routers， R1 and R2， configured as an HSRP group to  provide redundancy for the gateway. Router R1 is the active router and has been configured as  follows：   R1#configure terminal   R1（config）#interface fa0/0   R1（config-if）#ip address 10.10.0.5 255.255.255.0   R1（config-if）#standby 1 priority 150   R1（config-if）#standby preempt delay minimum 50   R1（config-if）#standby 1 track interface fa0/2 15   R1（config-if）#standby 1 ip 10.10.0.20   Which of the following describes the effect the standby preempt delay minimum 50 command will  have on router R1？（）

  • A、 The HSRP priority for router R1 will increase to 200.
  • B、 Router R1 will become the standby router if the priority drops below 50.
  • C、 The HSRP priority for router R1 will decrease to 50 points when Fa0/2 goes down.  
  • D、 Router R1 will wait 50 seconds before attempting to preempt the active router.

正确答案:D

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