During a recent OSPF election among three routers, RTA was elected the DR and RTB was elected the BDR, as seen in the graphic. Assume that RTA fails, and that RTB takes the place ofthe DR whi le RTC becomes the new BDR. What will happen when RTA comes bac

题目

During a recent OSPF election among three routers, RTA was elected the DR and RTB was elected the BDR, as seen in the graphic. Assume that RTA fails, and that RTB takes the place ofthe DR whi le RTC becomes the new BDR. What will happen when RTA comes back online？（）

A. A new election will take place establishing an all new DR and BDR based on configured priority levels and MAC addresses.

B. RTA will take the place of DR immediately upon esta blishing its adjacencies.

C. RTA will take the place of DR only if RTB fails.

D. RTA will take the place of DR only if both RTB and RTC fail.

相似考题

1.如图所示，管理员在RTA上配置了如下命令，则描述正确的是()。A.RTA仍然能够学习到RTB发布的路由信息B.RTB仍然能够学习到RTB发布的路由信息C.RTA的邻居信息里不包括RTBD.RTB的邻居信息里不包括RTA

2.What is the purpose of the OSPF router ID in a OR／BOR election?()A. It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point networkB. It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF routerC. It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access networkD. It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

3.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.

4.if all OSPF routers on a broadcast network have the same OSPF priority, which parameter is used to determine the new BDR at the time of a DR failure?()A.AB.BC.CD.D

更多“During a recent OSPF election among three routers, RTA was elected the DR and RTB was elec ”相关问题

  • 第1题：

    Refer to the exhibit. Which statement is true about the configuration? ()

    A. RTA will not establish an OSPF adjacency w ith RTB

    B. RTA will send OSPF hello packets, but will not send OSPF updates

    C. RTA will not accept OSPF hello packets from RTB

    D. RTA will send OSPF updates, but will not establish an adjacency with RTB


    参考答案：A

  • 第2题：

    Refer to the exhibit. Router RTA is the hub router for routers RTB and RTC. The Frame Relay network is configured with EIGRP, and the entire network is in autonomous system 1. However,router RTB a nd RTC are not receiving each other‘s routes. What is the solution?（）

    A.Check and change the access lists on router RTA

    B.Configure the auto summary command under router eigrp 1 on router RTA

    C.Configure subinterfaces on the spoke routers and assig n different IP address subnets for each subinterface

    D.Issue the no ip split horizon command on router RTA

    E.Issue the no ip split horizon eigrp 1 command on router RTA

    F.Configure a distribute list on router RTA that allows it to advertise all r outes to the spoke routers


    参考答案：E

  • 第3题：

    RTA是源DR路由器,RTB是RP路由器,组播源向RTA发送组播数据,但RTB上看不到通过PIM register报文想起注册的组播源source,可能得原因有()

    A.RTB到RTA没有单播路由

    B.RTA路由器学习不到RP信息

    C.RTA和RTB没有组播路由

    D.RTA学习到的RP不是RTB


    参考答案：B, D

  • 第4题：

    RTA和RTB运行OSPF路由协议，RTA和RTB通过Broadcast链路互连并建立了邻接关系，则RTATA和RTB在建立邻接关系的过程中会经过的状态机类型有（）。

    • A、Init
    • B、Attempt
    • C、Loading
    • D、Full

    正确答案:A,C,D

  • 第5题：

    在组播网络中，RTA 为主BSR 与主RP，RTB 为备BSR 与备RP，那么RTA、RTB  的C-BSR、C-RP 的优先级应该如何设置（）  

    • A、 RTA 50 50， RTB 100 100
    • B、 RTA 100 0， RTB 50 50
    • C、 RTA 100 50， RTB 50 0
    • D、 RTA 50 100， RTB 100 50

    正确答案:B

  • 第6题：

    两台MSR路由器RTA和RTB通过192.168.1.0/20网段互联，现在对两台路由器执行如下命令： [RTA]ospf1  [RTA-ospf-1]area 0 [RTA-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255 [RTB]ospf 100  [RTB-ospf-100]area 1  [RTB-ospf-100-area-0.0.0.1]network 192.168.1.0 0.0.0.255 从以上配置可以判断（）。

    • A、RTA和RTB可以建立OSPF邻居关系
    • B、RTA和RTB不可以建立OSPF邻居关系，若将areaID配置成一致，就可以建立OSPF邻居关系
    • C、RTA和RTB不可以建立OSPF邻居关系，若将OSPF进程号配置成一致，就可以建立OSPF邻居关系
    • D、RTA和RTB不可以建立OSPF邻居关系，必须将OSPF进程号和areaID都配置成一致，才可以建立OSPF邻居关系

    正确答案:B

  • 第7题：

    某运行OSPF路由协议的网络，Area1包含内部路由器RTA和区域边界路由器RTB，RTA和RTB直接相连；RTB已经可以正确地同其他区域的路由器建立邻接关系，但RTA始终无法学习到其他区域内的路由，则可能的原因有（）。

    • A、RTB没有接口被配置在Area 0
    • B、Area1被配置为Stub区域
    • C、RTA和RTB相连的接口的Router Priority都被设置为0
    • D、RTA和RTB相连的接口上配置的验证密码不一致

    正确答案:A,C,D

  • 第8题：

    RTA和RTB属于同一AS的不同OSPF区域，而且RTA和RTB均不是ABR，RTA引入一条到达1.1.1.1/32的外部路由，则在RTB计算到1.1.1.1/32网段的路由的过程中，一定会用到的LSA有（）。

    • A、Router-LSA
    • B、Network-LSA
    • C、Network-Summary-LSA
    • D、ASBR-Summary-LSA
    • E、AS-External-LSA

    正确答案:A,D,E

  • 第9题：

    What is the purpose of the OSPF router ID in a OR/BOR election?（）

    • A、It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network
    • B、It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router
    • C、It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network
    • D、It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

    正确答案:C

  • 第10题：

    An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?（）

    • A、Interfaces will automatically detect and build adjacencies with neighbor routers
    • B、DR and BDR elections will not occur
    • C、DR and BDR elections will occur
    • D、The neighbor command is required to build adjacencies
    • E、All routers must be configured in a fully meshed topology with all other routers

    正确答案:C,D

  • 第11题：

    单选题
    两台路由器RTA､RTB的串口S0用一条链路连接，链路协议位PPP，两各接口的网络类型均为point-to-point，此时接口与链路均为UP，配置该网段：   RTA（config-if-serial0）#ip address 10.10.10.1 255.255.0.0   RTA（config-router-ospf）#network 10.10.10.1 0.0.0.0 area 1   RTB（config-if-serial0）#ip address 10.10.10.2 255.255.255.0   RTB（config-router-ospf）# network 10.10.10.2 0.0.0.0 area 1   RTA（config）#show ip ospf neighbour   RTA邻居状态机最终状态（）
    A

    FULL

    B

    DOWN

    C

    TWO WAY

    D

    ATTEMP


    正确答案： A
    解析： 暂无解析

  • 第12题：

    多选题
    RTA是源DR路由器，RTB是RP路由器，组播源向RTA发送组播数据，但RTB上看不到通过PIM register报文想起注册的组播源source，可能得原因有（）
    A

    RTB到RTA没有单播路由

    B

    RTA路由器学习不到RP信息

    C

    RTA和RTB没有组播路由

    D

    RTA学习到的RP不是RTB


    正确答案： B,C
    解析： 暂无解析

  • 第13题：

    The Dev － 1 and Dev －3 routers are OSPF neighbors over the Ethernet 0／0 connection. Based on the show ip ospf neighbor output from the Dev － 1 and Dev － 3 routers, which statement is true?()

    A. Dev - 1 is the DR because it has a lower OSPF router ID

    B. Dev - 3 is the DR because it has a higher OSPF router priority

    C. Both Dev - 1 and Dev - 3 are using the def ault OSPF router priority

    D. Dev - 3 is the DR because it has a lower OSPF router ID

    E. Dev - 1 is the DR because it has a higher OSPF router priority


    参考答案：E

  • 第14题：

    The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance. As part of examining the router resources, the OSPF DRs need to be known. All the router OSPF priorities are at the default and the router IDs are shown with each router. Which routers are likely to have been elected as DR?（）

    A.Corp-1

    B.Corp-2

    C.Corp-3

    D.Corp-4

    E.Branch-1

    F.Branch-2


    参考答案：D, F

  • 第15题：

    在唐德斯(F．C．Donders)的减法反应时实验中，A、B、C三种反应时分别代表简单反应时、选择反应时和辨别反应时，它们的关系为

    A.RTB>RTA>RTC.B.RTC>RTB>RTA.C.RTC>RTA>RTB.D.RTB>RTC>RTA

    答案：D
    解析：
    选择反应时指的是根据不同的刺激物，在多种反应方式中选择符合要求的反应（即B反应），并执行该反应所需耍的时间，即RT。。当仅对多个刺激中某个特定的刺激进行反应（即C反应），而其他刺激出现时不予理会，此时测量到的是辨别反应时，即RT。。简单反应时是指给被试呈现单一的刺激，并要求他们只作单一的反应（即A反应），这时刺激一反应之间的时间间隔就是简单反应时，即RT一。A反应是最简单的，RTA是短的，唐德斯把这称之为基线时间。B反应除了基线操作以外还包括了刺激辨认和反应选择两种心理操作。C反应包括了基线操作和刺激辨认两种心理操作。即RTB>RTc>RTA一。

  • 第16题：

    RTA的Ethernet0/0和RTB的Ethernet0/0接到同一个局域网中并开启VRRP，同时创建一个虚拟路由器，ID为1，虚拟IP地址为10.1.1.254。RTA的Priority为200，RTB的Priority为缺省值。在RTB上用命令display vrrp interfaceEthernet0/0，看到：？Preempt：YESDelay：5？下面关于上述信息描述正确的是：（）

    • A、当RTB发现自己的优先级比RTA高后会立即抢占RTA称为Master
    • B、当RTB发现自己的优先级比RTA高后不会抢占RTA称为Master
    • C、当RTB发现自己的优先级比RTA高后会在5秒钟后抢占RTA称为Master
    • D、当RTB发现自己的优先级比RTA低后会在5秒钟后抢占RTA称为Master

    正确答案:C

  • 第17题：

    RTA与RTB运行OSPF路由协议，且都属于骨干区域。采用如下哪些方法能够将RTA的直连路由192.168.1.0/24发布到OSPF路由域中？（）

    • A、[RTA-ospf-1]import-routestatic
    • B、[RTA-ospf-1]import-routedirect
    • C、[RTA-ospf-1-area-0.0.0.0]network192.168.1.00.0.0.255
    • D、[RTA]iproute-static192.168.1.024null0RTA-ospf-1]import-routestatic

    正确答案:B,C

  • 第18题：

    RTA和RTB属于同一OSPF区域，RTA引入一条到达1.1.1.1/32的外部路由，则在RTB计算到1.1.1.1/32网段的路由的过程中，一定会用到的LSA有（）。

    • A、Router-LSA
    • B、Network-LSA
    • C、Network-Summary-LSA
    • D、ASBR-Summary-LSA
    • E、AS-External-LSA

    正确答案:A,E

  • 第19题：

    两台路由器RTA、RTB的串口Ｓ0用一条链路连接，链路协议位PPP，两各接口的网络类型均为point-to-point，此时接口与链路均为UP，配置该网段： RTA（config-if-serial0）#ipaddress 10.10.10.1 255.255.0.0； RTA（config-router-ospf）#network 10.10.10.10.0.0.0area 1； RTB（config-if-serial0）#ipaddress 10.10.10.2 255.255.255.0； RTB（config-router-ospf）#network 10.10.10.20.0.0.0area 1； RTA（config）#showipospfneighbour RTA邻居状态机最终状态（）

    • A、FULL
    • B、DOWN
    • C、TWOWAY
    • D、ATTEMP

    正确答案:A

  • 第20题：

    What are three characteristics of the OSPF routing protocol?（）

    • A、It converges quickly.
    • B、OSPF is a classful routing protocol.
    • C、It uses cost to determine the best route.
    • D、It uses the DUAL algorithm to determine the best route.
    • E、OSPF routers send the complete routing table to all directly attached routers.
    • F、OSPF routers discover neighbors before exchanging routing information.

    正确答案:A,C,F

  • 第21题：

    路由器A的配置如下：[RTA]aaa[RTA-aaa]_local-userhuaweipasswordcipherhello_[RTA-aaa]_local-userhuaweiservice-typeppp[RTA]interfaceSerial0[RTA-Serial0]link-protocolppp[RTA-Serial0]_pppauthentication-modepap[RTA-Serial0]ipaddress10.1.1.130路由器B的配置如下：[RTB]interfaceSerial0[RTB-Serial0]link-protocolppp[RTB-Serial0]_pppchapuserhuawei[RTB-Serial0]_pppchappasswordcipherhello[RTB-Serial0]ipaddress10.1.1.230当两台路由器Serial0相连时，两台路由器可以连接到对端。


    正确答案:错误

  • 第22题：

    路由器RTA与RTB之间建立了BGP连接并互相学习到了路由RTA与RTB都使用缺省定时器如果路由器间链路拥塞，导致RTA收不到RTB发出的Keepalive消息，则会发生以下哪个后果（）

    • A、30秒后，RTA认为邻居失效，并删除从RTB学来的路由
    • B、90秒后，RTA认为邻居失效，并删除从RTB学来的路由
    • C、120秒后，RTA认为邻居失效，并删除从RTB学来的路由
    • D、180秒后，RTA认为邻居失效，并删除从RTB学来的路由

    正确答案:D

  • 第23题：

    单选题
    A new network has been configured using OSPF as the routing protocol. With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?（）
    A

    point-to-point

    B

    Backbone area 0

    C

    Broadcast multicast

    D

    Non-broadcast multi-access

    E

    The DR/BDR process is done for all interface types


    正确答案： C
    解析： 暂无解析

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