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Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces (respectively), currently both successfully use OSPF MD5 authentication. The OSPF configuration includes the area 0 authentication command under the router ospf 1 command.Which of the

题目

Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces (respectively), currently both successfully use OSPF MD5 authentication. The OSPF configuration includes the area 0 authentication command under the router ospf 1 command.Which of the following commands must have been configur ed on R1‘s Fa0/0 interface?（）

A. ip ospf authentication null

B. ip ospf authentication message - digest

C. ip ospf authentication -key whatever- it - is

D. ip ospf message - digest - key 1 md5 whatever - it - is

E. ip ospf md5 1 key whatever - it - is

相似考题

1.Router R1 has a connected route for 10.1.1.0/24 off interface Fa0/0. Interface Fa0/0 has been enabled for OSPF due to a router ospf 1 and network 10.0.0.0 0.0.0.255 area 0 command. R1 also has EIGRP configured, with the redistribute ospf 1 metric 1000 100 10 1 1500 command configured under EIGRP.Which one of the following is true?（）A. R1 will not redistribute 10.1.1.0/24 into EIGRP, because R1 knows it as a connected route and not as an OSPF route.B. For any OS PF routes redistributed into EIGRP, the metric components includea value equivalent to 1 Mbps of bandwidth.C. For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 100 microseconds of delay.D. No subnets of network 10.0.0.0 will be redistributed due to the omission of the subnets parameter.

2.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.

3.OSPF is configured over a Frame Relay network as shown in the exhibit. All PVCs are active.However, R1 and R3 fail to see all OSPF routes in their routing tables. The show ip ospf neighbor command executed on R2 shows the state of t he neighbors. What should be done to fix the problem? （）A. The ip ospf network broadcast command should be configured on each Frame Relay interfaceB. The ip ospf network non -broadcast command should be configured on each Frame Relay interfaceC. Th e ip ospf priority value on the spoke routers should be set to 0D. The ip ospf priority value on the hub router should be set to 0E. The neighbor command should be configured under the OSPF routing process on all routers

4.Refer to the exhibit. On the basis of the configuration provided, how are the Hello packets sent by R2 handled by R5 in OSPF area 5?()A. The Hello packets will be exchanged and adjacency will be established between routers R2 and R5.B. The Hello packets will be exchanged but the routers R2 and R5 will become neighbors only.C. The Hello packets will be dropped and no adjacency will be established between routers R2 and R5.D. The Hello packets will be dropped but the routers R 2 and R5 will become neighbors.

更多“Routers R1 and R2, OSPF neighbors in area 0 over their Fa0／0 interfaces (respectively), cu ”相关问题

  • 第1题：

    Router R1 has been configured with the commands rout er eigrp 9 and network 172.16.2.0 0.0.0.255, with no other current EIGRP configuration. R1‘s (working) Fa0/0 interface has been configured with IP address 172.16.2.2/26. R1 has found three EIGRP neighbors reachable via interface Fa0/0, including the rou ter with IP address 172.16.2.20. When the engineer attempts to add the neighbor 172.16.2.20 fa0/0 command in EIGRP configuration mode.Which of the following occurs？（）

    A.Fa0/0 fails

    B.The command is rejecteD

    C.The existing three neighbors fail

    D.The neighborship with 172.16.2.20 fails and then reestablishes

    E.None of the other answers is correct


    参考答案：C

  • 第2题：

    What OSPF command, when configured, will include all interfaces into area 0?()

    A.network 0.0.0.0 255.255.255.255 area 0

    B.network 0.0.0.0 0.0.0.0 area 0

    C.network 255.255.255.255 0.0.0.0 area 0

    D.network all-interfaces area 0


    参考答案：A

  • 第3题：

    Router R1 has a connected route for 10.1.1.0/24 off interface Fa0/0. Interface Fa0/0 has been enabled for OSPF due to a router ospf 1 and network 10.0.0.0 0.0.0.255 area 0 command. R1 also has EIGRP configured, with the redistribute ospf 1 metric 1000 100 10 1 1500 command configured under EIGRP. Which one of the following is true?（）

    • A、R1 will not redistribute 10.1.1.0/24 into EIGRP, because R1 knows it as a connected route and not as an OSPF route.
    • B、For any OS PF routes redistributed into EIGRP, the metric components includea value equivalent to 1 Mbps of bandwidth.
    • C、For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 100 microseconds of delay.
    • D、No subnets of network 10.0.0.0 will be redistributed due to the omission of the subnets parameter.

    正确答案:B

  • 第4题：

    Which of the following answers can be verified as true based on the following command output from Router R1?（） R1#show ip ospf virtual - links Virtual Link OSPF_VL0 to router 4.4.4.4 is up Run as demand circuit DoNotAge LSA alloweD. Transit area 1, via interface FastEthernet0/1, Cost of using 3

    • A、R1 is configured with  an area 0 virtual - link 4.4.4.4 cost 3 command.
    • B、The ping 4.4.4.4 command on R1 must currently be successful.
    • C、R1's Fa0/0 OSPF cost is 3.
    • D、4.4.4.4 is known to R1 based on a Type 1 LSA in area 1.

    正确答案:D

  • 第5题：

    Router R1 has been configured with the commands rout er eigrp 9 and network 172.16.2.0 0.0.0.255, with no other current EIGRP configuration. R1's (working) Fa0/0 interface has been configured with IP address 172.16.2.2/26. R1 has found three EIGRP neighbors reachable via interface Fa0/0, including the rou ter with IP address 172.16.2.20. When the engineer attempts to add the neighbor 172.16.2.20 fa0/0 command in EIGRP configuration mode. Which of the following occurs？（）

    • A、Fa0/0 fails
    • B、The command is rejecteD
    • C、The existing three neighbors fail
    • D、The neighborship with 172.16.2.20 fails and then reestablishes
    • E、None of the other answers is correct

    正确答案:C

  • 第6题：

    Routers R1 and R2, currently EIGRP neighbors over their Fa0/0 interfaces (respectively),both use EIGRP authentication. Tuesday at 8 p.m. the neighborship fails. Which of the following wo uld not be useful when investigating whether authenticationhad anything to do with the failure？（）

    • A、debug eigrp packet
    • B、show key chain
    • C、show ip eigrp neighbor failure
    • D、show clock

    正确答案:C

  • 第7题：

    R1 has 5 working interfaces, with EIGRP neighbors existing off each interface. R1 has routes for subnets 10.1.1.0/24, 10.1.2.0/24, and 10.1.3.0/24, with EIGRP integer metrics of roughly 1 million, 2 million, a nd 3 million, respectively. An engineer then adds the ip summary - address eigrp 1 10.1.0.0 255.255.0.0 command to interface Fa0/0. Which of the following is true?（）

    • A、R1 loses and then reestablishes neighborships with all neighbors.
    • B、R1 no longer advert ises 10.1.1.0/24 to neighbors connected to Fa0/0.
    • C、1 advertises a 10.1.0.0/16 route out Fa0/0, with metric of around 3 million (largest metric of component subnets).
    • D、R1 advertises a 10.1.0.0/16 route out Fa0/0,with metric of around 2 million (med ian metric of component subnets).

    正确答案:B

  • 第8题：

    多选题
    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).


    正确答案： D,A
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following answers can be verified as true based on the following command output from Router R1?（） R1#show ip ospf virtual - links Virtual Link OSPF_VL0 to router 4.4.4.4 is up Run as demand circuit DoNotAge LSA alloweD. Transit area 1, via interface FastEthernet0/1, Cost of using 3
    A

    R1 is configured with  an area 0 virtual - link 4.4.4.4 cost 3 command.

    B

    The ping 4.4.4.4 command on R1 must currently be successful.

    C

    R1's Fa0/0 OSPF cost is 3.

    D

    4.4.4.4 is known to R1 based on a Type 1 LSA in area 1.


    正确答案： A
    解析： 暂无解析

  • 第10题：

    多选题
    Routers R1 and R2 are OSPF neighbors using their Fa0/0 interfaces, respectively, using default settings for all timers. An engineer ad ds the ip ospf hello - interval 6 command to R1's Fa0/0 configuration. Which of the following is true regarding the results from this change?（）
    A

    The show ip ospf neighbor command on R1 lists the revised Hello timer

    B

    The show ip ospf interfac e brief command on R1 lists the revised Hello timer

    C

    The R1 - R2 neighborship fails due to Hello timer mismatcH

    D

    The show ip ospf interface command on R1 lists the revised Hello timer


    正确答案： B,C
    解析： 暂无解析

  • 第11题：

    多选题
    Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces (respectively), currently both successfully use OSPF MD5 authentication. The OSPF configuration includes the area 0 authentication command under the router ospf 1 command. Which of the following commands must have been configur ed on R1's Fa0/0 interface?（）
    A

    ip ospf authentication null

    B

    ip ospf authentication message - digest

    C

    ip ospf authentication -key whatever- it - is

    D

    ip ospf message - digest - key 1 md5 whatever - it - is

    E

    ip ospf md5 1 key whatever - it - is


    正确答案： B,E
    解析： 暂无解析

  • 第12题：

    单选题
    Router R1 has a connected route for 10.1.1.0/24 off interface Fa0/0. Interface Fa0/0 has been enabled for OSPF due to a router ospf 1 and network 10.0.0.0 0.0.0.255 area 0 command. R1 also has EIGRP configured, with the redistribute ospf 1 metric 1000 100 10 1 1500 command configured under EIGRP. Which one of the following is true?（）
    A

    R1 will not redistribute 10.1.1.0/24 into EIGRP, because R1 knows it as a connected route and not as an OSPF route.

    B

    For any OS PF routes redistributed into EIGRP, the metric components includea value equivalent to 1 Mbps of bandwidth.

    C

    For any OSPF routes redistributed into EIGRP, the metric components include a value equivalent to 100 microseconds of delay.

    D

    No subnets of network 10.0.0.0 will be redistributed due to the omission of the subnets parameter.


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Routers R1 and R2, currently EIGRP neighbors over their Fa0/0 interfaces (respectively),both use EIGRP authentication. Tuesday at 8 p.m. the neighborship fails.Which of the following wo uld not be useful when investigating whether authenticationhad anything to do with the failure？（）

    A. debug eigrp packet

    B. show key chain

    C. show ip eigrp neighbor failure

    D. show clock


    参考答案：C

  • 第14题：

    The OSPF process has been started and the networks have been configured for Area 0 as shown in the diagram. The network administrator has several options for configuring RouterB to ensure that it will be preferred as the designated router (DR) for the 172.16.1.0 /24 LAN segment. What configuration tasks could be used to establish this preference (Choose three.)（）。

    A.Configure the priority value of the Fa0/0 interface of RouterB to a higher value than any other interface on the Ethernet network.

    B.Change the router id of Router B by assigning the IP address 172.16.1.130/24 to the Fa0/0 interface of RouterB.

    C.Configure a loopback interface on RouterB with an IP address higher than any IP address on the other routers.

    D.Change the priority value of the Fa0/0 interface of RouterB to zero.

    E.Change the priority values of the Fa0/0 interfaces of RouterA and RouterC to zero.

    F.No further configuration is necessary.


    参考答案：A, C, E

  • 第15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).

    正确答案:B,D

  • 第16题：

    Ten routers, R1 through R10, connect in a partial mesh over Frame Relay. For the mesh, R1 and R2 have PVCs connected to all other routers, but Routers R3 through R10 act as branch routers, with only two PVCs - one to R1 and one to R2. The routers u se IP subnet 10.1.1.0/24, with addresses 10.1.1.1, 10.1.1.2, and so on, through 10.1.1.10, respectively. The routers all use Inverse ARP to learn Frame Relay mapping information. All routers use a multipoint subinterface with network type point - tomultip oint nonbroadcast. A co - worker's implementation plan lists lots of configuration commands related to this design. The design states that all hosts should be able to ping all other hosts. Which commands are required for proper functioning of OSPF in this case?（）

    • A、frame - relay map commands on R3 - R10 referencing the other routers in this group
    • B、Nine OSPF neighbor commands on each router
    • C、Nine OSPF neighbor commands on R1 and R2, with only two such commands on R3 - R10
    • D、R1 and R2 with ip ospf prio rity 1 commands to ensure they become DR and BDR
    • E、R3 - R10 with ip ospf priority 0 commands to ensure they do not become DR or BDR

    正确答案:A,C

  • 第17题：

    Routers R1 and R2 are EIGRP neighbors using their Fa0/0 interfaces, respectively. An engineer adds the ip hello - interval eigrp 9 6 command to R1's Fa0/0 configuration. Which of the following is true regarding the results from this c hange？（）

    • A、The show ip eigrp neighbors command on R1 lists the revised Hello timer
    • B、The show ip eigrp interfaces command on R1 lists the revised Hello timer
    • C、The R1 - R2 neighborship fails due to Hello timer mismatcH
    • D、The show ip eigrp interfaces detail command on R1 lists the revised Hello timer

    正确答案:D

  • 第18题：

    Rout er R1 directly connects to subnet 10.1.1.0/24 with its Fa0/0 interface. R1 can ping four other working OSPF routers in that subnet. R1 is neither the designated router (DR) nor backup DR (BDR). OSPF is working correctly on all five routers. Which of the following is true on R1?（）

    • A、The show ip ospf neighbors command lists two neighbors off Fa0/0.
    • B、The show ip ospf neighbors command lists four neighbors off Fa0/0.
    • C、The show ip ospf neighbors command lists two neighbors off Fa0/0 in the FULL state.
    • D、The show ip ospf neighbors command lists two neighbors off Fa0/0 in the DISCO state.

    正确答案:B,C

  • 第19题：

    单选题
    R1 has 5 working interfaces, with EIGRP neighbors existing off each interface. R1 has routes for subnets 10.1.1.0/24, 10.1.2.0/24, and 10.1.3.0/24, with EIGRP integer metrics of roughly 1 million, 2 million, a nd 3 million, respectively. An engineer then adds the ip summary - address eigrp 1 10.1.0.0 255.255.0.0 command to interface Fa0/0. Which of the following is true?（）
    A

    R1 loses and then reestablishes neighborships with all neighbors.

    B

    R1 no longer advert ises 10.1.1.0/24 to neighbors connected to Fa0/0.

    C

    1 advertises a 10.1.0.0/16 route out Fa0/0, with metric of around 3 million (largest metric of component subnets).

    D

    R1 advertises a 10.1.0.0/16 route out Fa0/0,with metric of around 2 million (med ian metric of component subnets).


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    What OSPF command, when configured, will include all interfaces into area 0?（）
    A

    network 0.0.0.0 255.255.255.255 area 0

    B

    network 0.0.0.0 0.0.0.0 area 0

    C

    network 255.255.255.255 0.0.0.0 area 0

    D

    network all-interfaces area 0


    正确答案： B
    解析： 暂无解析

  • 第21题：

    多选题
    Ten routers, R1 through R10, connect in a partial mesh over Frame Relay. For the mesh, R1 and R2 have PVCs connected to all other routers, but Routers R3 through R10 act as branch routers, with only two PVCs - one to R1 and one to R2. The routers u se IP subnet 10.1.1.0/24, with addresses 10.1.1.1, 10.1.1.2, and so on, through 10.1.1.10, respectively. The routers all use Inverse ARP to learn Frame Relay mapping information. All routers use a multipoint subinterface with network type point - tomultip oint nonbroadcast. A co - worker's implementation plan lists lots of configuration commands related to this design. The design states that all hosts should be able to ping all other hosts. Which commands are required for proper functioning of OSPF in this case?（）
    A

    frame - relay map commands on R3 - R10 referencing the other routers in this group

    B

    Nine OSPF neighbor commands on each router

    C

    Nine OSPF neighbor commands on R1 and R2, with only two such commands on R3 - R10

    D

    R1 and R2 with ip ospf prio rity 1 commands to ensure they become DR and BDR

    E

    R3 - R10 with ip ospf priority 0 commands to ensure they do not become DR or BDR


    正确答案： A,E
    解析： 暂无解析

  • 第22题：

    多选题
    Rout er R1 directly connects to subnet 10.1.1.0/24 with its Fa0/0 interface. R1 can ping four other working OSPF routers in that subnet. R1 is neither the designated router (DR) nor backup DR (BDR). OSPF is working correctly on all five routers. Which of the following is true on R1?（）
    A

    The show ip ospf neighbors command lists two neighbors off Fa0/0.

    B

    The show ip ospf neighbors command lists four neighbors off Fa0/0.

    C

    The show ip ospf neighbors command lists two neighbors off Fa0/0 in the FULL state.

    D

    The show ip ospf neighbors command lists two neighbors off Fa0/0 in the DISCO state.


    正确答案： C,A
    解析： 暂无解析

  • 第23题：

    单选题
    Routers R1 and R2 are EIGRP neighbors using their Fa0/0 interfaces, respectively. An engineer adds the ip hello - interval eigrp 9 6 command to R1's Fa0/0 configuration. Which of the following is true regarding the results from this c hange？（）
    A

    The show ip eigrp neighbors command on R1 lists the revised Hello timer

    B

    The show ip eigrp interfaces command on R1 lists the revised Hello timer

    C

    The R1 - R2 neighborship fails due to Hello timer mismatcH

    D

    The show ip eigrp interfaces detail command on R1 lists the revised Hello timer


    正确答案： D
    解析： 暂无解析

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