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.
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.
相关考题：
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
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
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
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.
Refer to the exhibit. Which statement is true about the configuration? () A. RTA will not establish an OSPF adjacency w ith RTBB. RTA will send OSPF hello packets, but will not send OSPF updatesC. RTA will not accept OSPF hello packets from RTBD. RTA will send OSPF updates, but will not establish an adjacency with RTB
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 IDB. Dev - 3 is the DR because it has a higher OSPF router priorityC. Both Dev - 1 and Dev - 3 are using the def ault OSPF router priorityD. Dev - 3 is the DR because it has a lower OSPF router IDE. Dev - 1 is the DR because it has a higher OSPF router priority
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 RTAB.Configure the auto summary command under router eigrp 1 on router RTAC.Configure subinterfaces on the spoke routers and assig n different IP address subnets for each subinterfaceD.Issue the no ip split horizon command on router RTAE.Issue the no ip split horizon eigrp 1 command on router RTAF.Configure a distribute list on router RTA that allows it to advertise all r outes to the spoke routers
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-1B.Corp-2C.Corp-3D.Corp-4E.Branch-1F.Branch-2
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
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
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、InitB、AttemptC、LoadingD、Full
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MasterB、当RTB发现自己的优先级比RTA高后不会抢占RTA称为MasterC、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MasterD、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
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 100B、 RTA 100 0， RTB 50 50C、 RTA 100 50， RTB 50 0D、 RTA 50 100， RTB 100 50
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-routestaticB、[RTA-ospf-1]import-routedirectC、[RTA-ospf-1-area-0.0.0.0]network192.168.1.00.0.0.255D、[RTA]iproute-static192.168.1.024null0RTA-ospf-1]import-routestatic
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
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-LSAB、Network-LSAC、Network-Summary-LSAD、ASBR-Summary-LSAE、AS-External-LSA
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 0B、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0D、RTA和RTB相连的接口上配置的验证密码不一致
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、FULLB、DOWNC、TWOWAYD、ATTEMP
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-LSAB、Network-LSAC、Network-Summary-LSAD、ASBR-Summary-LSAE、AS-External-LSA
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.
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
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。
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 routersB、DR and BDR elections will not occurC、DR and BDR elections will occurD、The neighbor command is required to build adjacenciesE、All routers must be configured in a fully meshed topology with all other routers
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
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（）AFULLBDOWNCTWO WAYDATTEMP
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?（）Apoint-to-pointBBackbone area 0CBroadcast multicastDNon-broadcast multi-accessEThe DR/BDR process is done for all interface types
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（）ARTB到RTA没有单播路由BRTA路由器学习不到RP信息CRTA和RTB没有组播路由DRTA学习到的RP不是RTB