关于OSPF协议中DR（Designated Router）的产生，下列说法中正确的是（）。A、DR是系统管理员通过配置命令人工指定的B、DR是同一网段内的路由器通过一种算法选举出来的C、成为DR的路由器一定是网段内优先级（priority）最高且RouterID最大的D、可以通过配置命令使一台路由器不可能成为DR
关于OSPF协议中DR（Designated Router）的产生，下列说法中正确的是（）。
- A、DR是系统管理员通过配置命令人工指定的
- B、DR是同一网段内的路由器通过一种算法选举出来的
- C、成为DR的路由器一定是网段内优先级（priority）最高且RouterID最大的
- D、可以通过配置命令使一台路由器不可能成为DR
相关考题：
在广播网络中，OSPF协议要选出一个指定路由器(Designated Router，DR)。DR有几个作用，以下关于DR的描述中，(40)不是DR的作用。A．减少网络通信量B．检测网络故障C．负责为整个网络生成LSAD．减少链路状态数据库的大小
Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface.What command would make this router not use a DR, and dynamically discover OSPF neighbors?（）A. ip ospf network broadcastB. ip ospf network non - broadcastC. ip ospf network point - to - multipointD. ip ospf network point - to - multipoint non - broadcast
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. You have completed an OSPF implementation, and you are verifying OSPF operation. You notice that router A and router B are stuck in the two - way state. From the show ip ospf interface command output, what is the cause of this issue?（）A. All OSPF implementations must have at le ast one interface in area 0.B. You are attempting to run in the broadcast mode over an NBMA interface.C. Both routers are configured to function as a BDR; therefore, there is no DR router.D. Someone has changed the OSPF router ID; therefore you must clear the OSPF process.E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.
Refer to the exhibit. What two statements are true?() A. This is the designated router (DR) on the FastEthernet 0/0 link.B. The output was generated by the show ip interface c ommand.C. The router was configured with the commands:r outer ospf 1 network 172.16.6.0 0.0.0.255 area 1D. The IP address of the backup designated router (BDR) is FE80::205:5FFF:FED3:5808.E. Interface FastEthernet 0/0 was configured with the ipv6 o spf 1 area 1 command.F. OSPF version 2 has been enabled to support IPv6.
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
Which one of the following privileged EXEC mode IOS show commands will display the state of the OSPF DR／BDR (designated router ／ backup designated router) election process?() A. TK1# show ip ospf interfaceB. TK1# show ip ospf priorityC. TK1# show ospf neighbor detailD. TK1# show ospf processesE. TK1# show ospf neighbor state
On what kinds of networks does OSPF elect a backup designated router?() A. Point-to-pointB. Point to multipointC. BroadcastD. Non-broadcast multi-access
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
A network administrator is troubleshooting the OSPF configuration of routers R1 an dR2.The routers cannote stablish an adjacency relation ship on their common Ethernet link.The graphic shows the output of the show ip ospf interface e0 command for routers R1 an dR2.Based on the information in the graphic，what is the cause of this problem？（）A.The OSPF area is not configured properly.B.The priority on R1 should be set higher.C.The cost on R1 should be set higher.D.The hello and dead timers are not configured properly.E.A backup designated router needs to be added to the network.F.The OSPF process ID numbers must match.
在广播网络中， OSPF 协议要选出一个指定路由器（Designated Router ，DR）。 以下不是 DR 的作用的是A.减少网络通信量B.检测网络故障C.负责为整个网络生成 LSAD.减少链路状态数据库的大小
两台汇聚交换机通过以太网相连，启用OSPF后，需要选举DR。下列关于OSPF的DR/BDR的描述，错误的是（）A、在广播型的网络中，如果没有DR，OSPF协议无法正确运行，但如果没有BDR，OSPF协议仍然可以正确运行B、在一个广播型的网络中，即使只有一台路由器，仍旧需要选举DR。C、DR和BDR与本*网段内的所有运行OSPF协议的路由器建立邻接关系，但DR和BDR之间不再建立邻接关系。D、当DR故障时，BDR将成为新的DR。故障的DR恢复后，不会抢占DR身份
In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）A、Multicast sourceB、Multicast receiverC、RPD、RP mapping agentE、Designated Router （DR）
Which OSPF network type is ideal for partially meshed NBMA networks because it is easy to configure（requires no configuration of neighbor commands）， consumes only one IP subnet， and requires no designated router election？
关于OSPF协议中的DR、BDR，下列说法中正确的是（）。A、在广播型的网络中，如果没有DR，协议无法正确运行B、在一个广播型的网络中，即使只有一台路由器，仍旧需要选举DRC、DR和BDR与本网段内的所有运行OSPF协议的路由器建立邻接（adjacency）关系，但DR和BDR之间不再建立邻接关系D、DR会生成本网段内的NetwrokLSA（Type=2），但BDR不会
在OSPF协议中，对于指定路由器Designated Router的描述，下列哪些描述是正确的。（）A、DR不是人为指定的，而是由本网段中所有的路由器共同选举出来的B、若两台路由器的优先级值不同，就选择优先级值较小的路由器作为DRC、DR选举时，若两台路由器的优先级值相等，则选择Router ID大的路由器作为DRD、网段中的DR一定是优先级数值最大的那台路由器
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
Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface. What command would make this router not use a DR, and dynamically discover OSPF neighbors?（）A、ip ospf network broadcastB、ip ospf network non - broadcastC、ip ospf network point - to - multipointD、ip ospf network point - to - multipoint non - broadcast
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.
单选题Which one of the following privileged EXEC mode IOS show commands will display the state of the OSPF DR/BDR (designated router / backup designated router) election process?（）ATK1# show ip ospf interfaceBTK1# show ip ospf priorityCTK1# show ospf neighbor detailDTK1# show ospf processesETK1# show ospf neighbor state
单选题Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface. What command would make this router not use a DR and require static OSPF neighbor definition?（）Aip ospf network broadcastBip ospf netw ork non - broadcastCip ospf network point - to - multipointDip ospf network point - to - multipoint non - broadcast
单选题On which types of network will OSPF elect a backup designated router（）。Apoint-to-point and multiaccessBpoint-to-multipoint and multiaccessCpoint-to-point and point-to-multipointDnonbroadcast and broadcast multipointEnonbroadcast and broadcast multiaccess
多选题On what kinds of networks does OSPF elect a backup designated router?（）APoint-to-pointBPoint to multipointCBroadcastDNon-broadcast multi-access