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单选题
R1 is internal to area 1, and R2 is internal to area 2. Subnet 10.1.1.0/24 exists in area 2 as a connected subnet off R2. ABR ABR1 connects area 1 to backbone area 0, and ABR2 c onnects area 0 to area 2. Which of the following LSAs must R1 use when calculating R1's best route for 10.1.1.0/24?（）
A
R2's Type 1 LSA
B
Subnet 10.1.1.0/24's Type 2 LSA
C
ABR1's Type 1 LSA in area 0
D
Subnet 10.1.1.0/24's Type 3 LSA in Area 0
E
Subnet 10.1.1.0/24's Type 3 LSA in Area 1
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更多 “单选题R1 is internal to area 1, and R2 is internal to area 2. Subnet 10.1.1.0/24 exists in area 2 as a connected subnet off R2. ABR ABR1 connects area 1 to backbone area 0, and ABR2 c onnects area 0 to area 2. Which of the following LSAs must R1 use when calculating R1's best route for 10.1.1.0/24?（）A R2's Type 1 LSAB Subnet 10.1.1.0/24's Type 2 LSAC ABR1's Type 1 LSA in area 0D Subnet 10.1.1.0/24's Type 3 LSA in Area 0E Subnet 10.1.1.0/24's Type 3 LSA in Area 1” 相关考题
考题
路由器R1的拓扑连接和地址分配如下图所示，如果在R1上安装OSPF协议，运行命令：router ospf 200，则配置E0和E1端口的命令分别是______。A．network 10.1.1.0 255.255.255.0 area 0 network 192.168.1.0 255.255.255.0 area 1B．network 10.1.1.1 255.255.255.0 area 0 network 192.168.1.1 255.255.255.0 area 1C．network 10.1.1.255 0.0.0.8 area 0 network 192.168.1.255 0.0.0.8 area 1D．network 10.1.1.0 0.0.0．255 area 0.0.0.0 network 192.168.1.0 0.0.0.255 area 1
考题
路由器R1的拓扑连接和地址分配如图1-9所示，如果在R1上安装OSPF协议，运行下列命令：router ospf 200，则配置E0和E1端口的命令分别是(40)。A．network 10.1.1.0 255.255.255.0 area 0 network 192.168.1.0 255.255.255.0 area 1B．network 10.1.1.1 255.255.255.0 area 0 network 192.168.1.1 255.255.255.0 area 1C．network 10.1.1.255 0.0.0.8 area 0 network 192.168.1.255 0.0.0.8 area 1D．network 10.1.1.0 0.0.0.255 area 0.0.0.0 network 192.168.1.0 0.0.0.255 area 1
考题
阅读以下说明，回答问题1和问题2，将解答填入答题纸对应的解答栏内。 【说明】 某公司有3个分支机构，网络拓扑结构及地址分配如图4-1所示。【问题1】（每空1分，共11分） 公司申请到202.111.1.0/29的公有地址段，采用NAPT技术实现公司内部访问互联网的要求，其中，192.168.16.0/22网段禁止访问互联网。 R1、R2和R3的基本配置已正确配置完成，其中R1的配置如下。请根据拓扑结构，完成下列配置代码。 R1的基本配置及NAPT配置如下： R1enable Rlconfig tenrunal R1(config)interface fastenthemet 0/0 R1(config-if)ip address 192.168.0.1 255.255.255.252 R1(config-if)no shutdown Rl(config-if)exit R1(config)interface fastenthemet 0/1 R1(config-if)ip address 192.168.0.9 255.255.255.252 R1(config-if)no shutdown R1(config-if)exit R1(config)interface fastenthernet 0/2 R1(config-if)ip address （1） 255.255.252.0 //使用网段中最后一个地址 R1(config-if)no shutdown R1(config-if)exit R1(config)interface serial 0 R1(config-if)ip address 202.111.1.1 255.255.255.248 R1(config-if)no shutdown R1(corffig)ip nat pool ss 202.111.1.1 （2） netmask （3） R1(corffig) interface （4） fastenthernet 0/0-1 R1(config-if)ip nat （5） R1(config-if)interface serial 0 Rl(config-if)ip nat （6） R1(config-if)exit R1(config)access-Iist l permit 192.168.0.0 （7） Rl(config)ip nat inside （8） list （9） pool （10） （11） 【问题2】．（每空2分，共4分） 在R1、R2和R3之间运行OSPF路由协议，其中R1、R2和R3的配置如下。 行号 配置代码 1 R1(config)router ospf 1 2 R1(config-router)network 192.168.4.0 0.0.3.255 area 0 3 Rl(config-router)network 192.168.0.0 0.0.0.3 area 0 4 Rl(config-router)network 192.168.0.8 0.0.0.3 area 0 5 R2enable 6 R2config terminal 7 R2(config)router ospf 2 8 R2(config-router)netvrork 192.168.8.0 0.0.3.255 area 0 9 R2 (config-router)network 192.168.12.0 0.0.3.255 area 0 1 0 R2 (config-router)network 192.168.0.4 00.0.3 area 0 1 1 R3enable 1 2 R3config terminal 1 3 R3(config)router ospf 3 1 4 R3(config-router)netvrork 192168.0.8 00.0.3 area 0 1 5 R3(config-router)network 192.168.0.4 0.0.0.3 area 0 1．配置完成后，在R1和R2上均无法ping通R3的局域网，可能的原因是（12）。 （12）备选答案： A．在R3上未宣告局域网路由 B．以上配置中第7行和第13行配置错误 C．第1行配置错误 D．R1、R2未宣告直连路由． 2．在OSPF中重分布默认路由的命令是：（13）。 （13）备选答案： A．Rldefault-informaton originate B．R1(config-if)default-information originate C．R1(config-router)default-information originate D．Rl(config)default-information originate
考题
ABR R1 has been configured with an area 1 stub no － summary command. Which stubby area type is area 1?()
A. StubB. Totally stubbyC. NSSAD. Totally NSSA
考题
Which of the following is true about routers internal to a totally NSSA area?()
A. Routers cannot redistribute external routes into the area.B. Routers should have zero Type 3 LSAs in their LSDBs.C. Routers should have zero Type 5 LSAs in their LSDBs.D. Routers should learn default routes from the ABRs attached to the area.
考题
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.
考题
You are developing a verification plan for an upcoming OSPF implementation. Part of this plan is to verify the status of type 3 LSAs within the network. Which routers should you verify first to ensure that the configuration s are correct for generating type 3 LSAs?（）A. Internal routers within the backbone area (area 0)B. Internal routers within the NSSAsC. Internal routers within the stubby areasD. ASBRsE. ABRsF. DRs and BDRs
考题
Refer to the exhibit. OSPF is configured on all routers in the network. On the basis of the show ip ospf n eighbor output, what prevents R1 from establishing a full adjacency with R2? ()
A. Router R1 will only establish full adjacency with the DR and BDR on broadcast multi- access networks.B. Router R2 has been elected as a DR for the broadcast multiaccess network in OSPF area 1.C. Routers R1 and R2 are configured as stub routers for OSPF area 1 and OSPF area 2.D. Router R1 and R2 are configured for a virtual link between OSPF area 1 and OSPF area 2.E. The Hello parameters on routers R1 and R2 do not m atch.
考题
路由器R1的拓扑连接和地址分配如图5-3所示，如果在R1上安装OSPF协议，运行命令router ospf 200，则配置E0和E1端口的命令分别是(26)。A．network 10.1.1.0255.255.255.0 area0 network 192.168.1.0 255.255.255.0 area 1B．network 10.1.1.1 255.255.255.0 area0 network 192.168.1.1 255.255.255.0 area 1C．network 10.1.1.255 0.0.0.8 area 0 network 192.168.1.255 0.0.0.8 area 1D．network 10.1.1.0 0.0.0.255 area 0.0.0.0 network 192.168.1.0 0.0.0.255 area 1
考题
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）A、A virtual link to area 0.B、OSPF summarization command.C、default - cost extension to the area command.D、no - summary extension to the area stub comm and.E、None of the other alternatives apply
考题
R1, an ABR between backbone area 0 and area 1, has intra - area routes in area 0 for 10.1.1.0/24,10.1.2.0/24, and 10.1.3.0/24. These routes have metrics of 21, 22, and 23, respectively. An engineer then adds the area 0 r ange 10.1.0.0 255.255.0.0 command under the OSPF process of R1. Which of the following is true?（）A、R1 loses and then re - establishes neighborships with all neighbors.B、R1 no longer advertises 10.1.1.0/24 to neighbors into area 1.C、R1 advertises a 1 0.1.0.0/16 route into area 1 with a metric of 23 (largest metric).D、R1 advertises a 10.1.0.0/16 route into area 1 with metric of 21 (lowest metric).
考题
R1 is internal to area 1, and R2 is internal to area 2. Subnet 10.1.1.0/24 exists in area 2 as a connected subnet off R2. ABR ABR1 connects area 1 to backbone area 0, and ABR2 c onnects area 0 to area 2. Which of the following LSAs must R1 use when calculating R1's best route for 10.1.1.0/24?（）A、R2's Type 1 LSAB、Subnet 10.1.1.0/24's Type 2 LSAC、ABR1's Type 1 LSA in area 0D、Subnet 10.1.1.0/24's Type 3 LSA in Area 0E、 Subnet 10.1.1.0/24's Type 3 LSA in Area 1
考题
A network de sign shows area 1 with three internal routers, area 0 with four internal routers, and area 2 with five internal routers. Additionally, one ABR (ABR1) connects areas 0 and 1, plus a different ABR (ABR2) connects areas 0 and 2. How many Type 1 LSAs would b e listed in ABR2's LSDB?（）A、6B、7C、15D、12E、None of the other answers is correct.
考题
You are developing a verification plan for an upcoming OSPF implementation. Part of this plan is to verify the status of type 3 LSAs within the network. Which routers should you verify first to ensure that the configuration s are correct for generating type 3 LSAs?（）A、Internal routers within the backbone area (area 0)B、Internal routers within the NSSAsC、Internal routers within the stubby areasD、ASBRsE、ABRsF、DRs and BDRs
考题
Which three statements about BGP confederation and route reflectors are true？ （）A、Clusters are used in confederation schemes to avoid loops.B、BGP network can have a confederation within a route reflector area.C、An internal BGP network cannot have a route reflector within a confederation.D、An internal BGP network can have a route reflector within a confederation.E、Clusters are used in route reflector schemes to avoid loops.F、BGP network cannot have a confederation within a route reflector area.
考题
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.
考题
What type of router cannot exist within a stub area？（）A、 ABRB、 ASBRC、 internal routerD、 non-backbone router
考题
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.
考题
单选题The internal volume of a cargo hold measured from the inside faces of the cargo battens，the lower side of the deck beams，and the top of the tank top ceiling is known as the（）.A
gross tonnageB
deadweight spaceC
bale cubicD
stowage area
考题
单选题ABR R1 has been configured with an area 1 stub no - summary command. Which stubby area type is area 1?（）A
StubB
Totally stubbyC
NSSAD
Totally NSSA
考题
单选题A network de sign shows area 1 with three internal routers, area 0 with four internal routers, and area 2 with five internal routers. Additionally, one ABR (ABR1) connects areas 0 and 1, plus a different ABR (ABR2) connects areas 0 and 2. How many Type 1 LSAs would b e listed in ABR2's LSDB?（）A
6B
7C
15D
12E
None of the other answers is correct.
考题
单选题What type of router cannot exist within a stub area？（）A
ABRB
ASBRC
internal routerD
non-backbone router
考题
多选题Which of the following is true about routers internal to a totally NSSA area?（）ARouters cannot redistribute external routes into the area.BRouters should have zero Type 3 LSAs in their LSDBs.CRouters should have zero Type 5 LSAs in their LSDBs.DRouters should learn default routes from the ABRs attached to the area.
考题
单选题Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）A
A virtual link to area 0.B
OSPF summarization command.C
default - cost extension to the area command.D
no - summary extension to the area stub comm and.E
None of the other alternatives apply
考题
多选题A company uses Routers R1 and R2 to connect to ISP1 and ISP2, respectively, with Routers I1 and I2 used at th e ISPs. R1 peers with I1 and R2; R2 peers with I2 and R1. R1 and R2 do not share a common subnet, relying on other routers internal to the Enterprise for IP connectivity between the two routers. Which of the following could be used to prevent potential routing loops in this design?（）AUsing an iBGP mesh inside the Enterprise coreBConfiguring default routes in the Enterprise pointing to both R1 and R2CRedistributing BGP routes into the Enterprise IGPDTunneling the packets for the i BGP connection between R1 and R2
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