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【单选题】

Router R1, an ASBR connected to the Internet and to backbone area 0, has been configured with a default - information originate command.<br /> Which of the following is true about the effects of this configuration command?（）

A、R1 will always create and flood a default route into the OSPF domain.

B、R1 will create and flood an LSA for prefix/length 0.0. 0.0/0 into the OSPF domain if R1's IP routing table has a route to 0.0.0.0/0.

C、R1 will set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, regardless of whether R1 has a default route.

D、R1 w ill set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, but only if R1 has a route to 0.0.0.0/0.

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更多“ Router R1, an ASBR connected to the Internet and to backbone area 0, has been configured with a default - information originate command.<br /> Which of the following is true about the effects of this configuration command?（）”相关的问题
第1题
[单选题] Based on the show ip route isis output on R1, which statement is true? （）

A、The i su 10.1.0.0/23 route is a suppressed route.  B、The i su 10.1. 0.0/23 route is a summary route.  C、The i su 10.1.0.0/23 route is an IS - IS external route.  D、The R1 IS - IS router is an ASBR.  E、The R1 IS - IS router is an ABR that belongs to multiple IS - IS areas.  F、The R1 IS - IS router is performing route aggregation and is suppressing the more specific 10.1.0.0/23 prefix.  

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第2题
[单选题] Router R1 exists in an Enterprise that uses EIGRP as its routing protocol. The show ip route command output on router R1 lists the following phrase: "Gateway of last resort is 1.1.1.1 to network 2.0.0.0". Whic h of the following is most likely to have caused this output to occur on R1?（）

A、R1 has been configured with an ip default- network 2.0.0.0 command.  B、R1 has been configured with an ip route 0.0.0.0 0.0.0.0 1.1.1.1 command.  C、R1 has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.  D、Another router has been configured with an ip default - network 2.0.0.0 command.  E、Another router has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.  

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第3题
[单选题] 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.  

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第4题
[单选题] The following output exists on Router R1, a router internal to area 1. What can you d etermine as true from the output of the show ip ospf database summary command?（）

A、The LSA was created by an ABR due to an area range command.  B、The LSA was created by an ASBR due to a summary - address command.  C、If cr eated by an area range command, the best metric for a subordinate subnet on that ABR must have been 11.  D、None of the other answers is correct.  

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第5题
[单选题] 正确地为路由器命名为R1的命令是（）。

A、hostname R1  B、name R1  C、router name R1  D、name router R1  

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第6题
[单选题] Router R1 sits inside OSPF area 1. Router R2 redistributes an E1 route into OSPF for prefix 2.2.2.0/24, with external metric 20. Router R22 redistributes an E2 route for the same prefix/length, external metric 10. Under what conditions will R1 choose as it s best route the route through R22?（）

A、R1 will always choose the route through R22.  B、As long as R1's best internal OSPF cost to reach R22 is less than 10.  C、As long as R1's best internal OSPF cost to reach R22 is less than 20.  D、R1 will never choo se the route through R22 if the E1 route through R2 is available.  

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第7题
[] Router R1 sits at an Enterprise branch office, using the Internet for its only connectivity back to the rest of the EnterprisE. Which of the following is not a ben efit of using an IPsec tunnel for packets sent through the Internet, between R1 and the rest of the Enterprise?（） Router R1 sits at an Enterprise branch office, using the Internet for its only connectivity back to the rest of the EnterprisE. Which of the following is not a ben efit of using an IPsec tunnel for packets sent through the Internet, between R1 and the rest of the Enterprise?（）

A、A. Privacy  B、B. Authentication  C、C. Allows using an IGP between R1 and the Enterprise  D、D. Secure communications  

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第8题
[] The following command output was gathered from Router R1, an ABR between areas 0 (backbone) and area 1. In this internetwork, area 0 contains all the subnets of cla ss A network 10.0.0.0. R1's OSPF process has a distribute - list prefix question in command configured. Assuming the subnets listed in the answers actually exist in area 0. Which of the following occurs on router R1?（） R1#sh ip prefix - list ip prefix - list  question: 4 entries seq 5 deny 10.1.2.0/24 ge 25 le 27 seq 15 deny 10.2.0.0/16 ge 30 le 30 seq 20 permit 0.0.0.0/0 le 32 The following command output was gathered from Router R1, an ABR between areas 0 (backbone) and area 1. In this internetwork, area 0 contains all the subnets of cla ss A network 10.0.0.0. R1's OSPF process has a distribute - list prefix question in command configured. Assuming the subnets listed in the answers actually exist in area 0. Which of the following occurs on router R1?（） R1#sh

A、A. R1 will not create/flood a type 3 LSA for subnet 10.1.2.0/26 into area 1  B、B. R1 will not create/flood a Type 3 LSA for subnet 1 0.1.2.0/24 into area 1  C、C. R1 will not have an OSPF route for subnet 10.1.2.0/26 in its IP routing tablE  D、D. R1 will not have an OSPF route for subnet 10.1.2.0/24 in its IP routing tablE  

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第9题
[] Refer to the exhibit. Routers R1 and R2 have established a neighbor relationship and are exchanging routing information. The network design requires that R1 r eceive routing updates from R2, but not advertise any routes to R2. Which configuration command sequence will successfully accomplish this task? （） Refer to the exhibit. Routers R1 and R2 have established a neighbor relationship and are exchanging routing information. The network design requires that R1 r eceive routing updates from R2, but not advertise any routes to R2. Which configuration command sequence will successfully accomplish this task? （）

A、A. R1(config)# router eigrp 1 R1(config - router)# passive - interface serial 0  B、B. R1(config)# access - list 2 0 deny any R1(config)# router eigrp 1 R1(config - router)# distribute - list 20 out serial 0  C、C. R2(config)# access - list 20 permit any R2(config)# router eigrp 1 R2(config - router)# distribute - list 20 in serial 0  D、D. R1(config)# access - list 20 permit any R 1(config)# router eigrp 1 R1(config - router)# distribute - list 20 in serial 0  E、E. R2(config)# access - list 20 deny any R2(config)# router eigrp 1 R2(config - router)# distribute - list 20 out serial 0  F、F. R2(config)# router eigrp 1 R2(config - router)# passive - interface serial 0  

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