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 nullB、ip ospf authentication message - digestC、ip ospf authentication -key whatever- it - isD、ip ospf message - digest - key 1 md5 whatever - it - isE、ip ospf md5 1 key whatever - it - is
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
相关考题：
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 nullB. ip ospf authentication message - digestC. ip ospf authentication -key whatever- it - isD. ip ospf message - digest - key 1 md5 whatever - it - isE. ip ospf md5 1 key whatever - it - is
Refer to the exhibit. OSPF has been configured on all routers in the network. However, router R1 does not receive a default route to router R2 as in tended. Which configuration change would ensure that R1 would receive a default route from R2? （）A. Add the area 1 stub command on routers R1.B. Add the always keyword to the default - information originate configuration command on router R2.C. Remov e the default information originate configuration command from router R2 and place it on router R1.D. Add the ip route 5.0.0.0 255.255.255.0 0.0.0.0 command to router R2.
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.
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. Routers R1 and R2 have been configured to operate with OSPF. Routers R1 and R3 have been configured to operate with RIP. After configuring the redistribution between OSPF a nd RIP on R1, no OSPF routes are distributed into RIP. What should be done to correct this problem? （）A. The redistribution command should be reentered with the match route - type parameter included.B. The redistribution command should be reentered wit h the route - map map - tag parameter included.C. The redistribution command should be reentered with the metric metric - value parameter included.D. Routes will first need to be distributed into another protocol, and then into RIP.
Refer to the exhibit. All routers have Protocol Independent Multicast (PIM) enabled interfaces. On the basis of the configuration provided on routers R1 and R2, which router will take on the func tion of rendezvous point (RP) for the multicast network? （）A. both routers R1 and R2B. router R1C. router R2D. none of the routers since they are not configured with static RP
Refer to the exhibit. Autonomous systems 200 and 300 have EBGP sessions established with their directly connected routers in au tonomous system 100. IGP has been configured on all routers in autonomous system 100 and they successfully exchange routing updates. Traffic originated in autonomous system 200 cannot reach the destination autonomous system 300. What configuration shoul d be done on the routers in autonomous system 100 in order for the traffic coming from autonomous system 200 to be forwarded to autonomous system 300?（）A. IBGP session must be established between routers R1 R2 and R2 R3, and the synchronization must be turned off.B. IBGP speakers within autonomous 100 must be fully meshed, and the synchronization must be turned on.C. IBGP session must be established between routers R1 R2 and R2 R3, and the synchronization must be turned on.D. IBGP session mu st be established between routers R1 and R3, and the synchronization must be turned off.E. IBGP speakers within autonomous 100 must be fully meshed, and the synchronization must be turned off.F. IBGP session must be established between routers R1 and R3, and the synchronization must be turned on.
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
A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. 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.
Routers R1 and R2 are EIGRP neighbors. R1 has been configured with the eigrp stub connected command. Which of the following is true as a result？（）A、R1 can learn EIGRP routes from R2, but R2 cannot learn EIGRP routes from R1B、R1 can send IP packets to R2, but R2 cannot send IP packets to R1C、R2 no longer learns EIGRP routes from R1 for routes not connected to R1D、R1 no longer replies to R2's Query messagesE、R2n o longer sends to R1 Query messages
Two directly connected routers， R1 and R2， are both configured for OSPF graceful restart. R2 is able to switch packets in hardware， but R1 is not. If a network administrator logs on to R2 and performs a system reload， which will be the result？（）A、Traffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.B、R2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed.C、R2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state.D、All the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.
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 groupB、Nine OSPF neighbor commands on each routerC、Nine OSPF neighbor commands on R1 and R2, with only two such commands on R3 - R10D、R1 and R2 with ip ospf prio rity 1 commands to ensure they become DR and BDRE、R3 - R10 with ip ospf priority 0 commands to ensure they do not become DR or BDR
Routers R1, R2, R3, and R4 connect to the same 10.10.10.0/24 LAN- based subnet. OSPF is fully working in the subnet. Later, R5, whose OSPF priority is higher than the other four routers, joins the subnet. Which of the following are true about the OSPF database exchange process over this subnet at this point?（）A、R5 will send its DD, LSR, and LSU packets to the 224.0.0.5 all - DR - routers multicast address.B、R5 will send its DD, LSR, and LSU pack ets to the 224.0.0.6 all - DR - routers multicast address.C、The DR will inform R5 about LSAs by sending its DD, LSR, and LSU packets to the 224.0.0.6 all- SPF - routers multicast address.D、The DR will inform R5 about LSAs by sending its DD, LSR, and LSU pa ckets to the 224.0.0.5 all- SPF - routers multicast address.
You have just completed an OSPF implementation. While executing your verification plan, you determine that R1 is not able to establish full OSPF adjacency with R2. The show ip ospf neighbor comman d output on R1 shows that R2 is stuck in the INIT state. What could be the cause of this problem?（）A、DR and BDR election errors between R1 and R2.B、The R2 router has not received the OSPF hello packets from the R1 router.C、Mismatched interface ma ximum transmission unit (MTU) configuration between the R1 and R2.D、Mismatched OSPF hello interval configuration between the R1 and R2E、Corrupted LSAs exchanges between the R1 and R2.
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.
R1 and R2 exchange HSRP between each other in the Company network. In which three HSRP states do routers send hello messages？（）A、 LearnB、 SpeakC、 StandbyD、 ListenE、 ActiveF、 Remove
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.
Which routers must be configured with the same authentication string when configuring OSPF authentication？（）A、all routers on a linkB、all routers in an areaC、all external OSPF peersD、all routers in an OSPF domain
多选题Refer to the graphic. R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem?（）AAll of the routers need to be configured for backbone Area 1.BR1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.CA static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.DThe hello and dead interval timers are not set to the same values on R1 and R3.EEIGRP is also configured on these routers with a lower administrative distance.FR1 and R3 are configured in different areas.
单选题Two directly connected routers， R1 and R2， are both configured for OSPF graceful restart. R2 is able to switch packets in hardware， but R1 is not. If a network administrator logs on to R2 and performs a system reload， which will be the result？（）ATraffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.BR2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed.CR2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state.DAll the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.
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?（）Aframe - relay map commands on R3 - R10 referencing the other routers in this groupBNine OSPF neighbor commands on each routerCNine OSPF neighbor commands on R1 and R2, with only two such commands on R3 - R10DR1 and R2 with ip ospf prio rity 1 commands to ensure they become DR and BDRER3 - R10 with ip ospf priority 0 commands to ensure they do not become DR or BDR
多选题Routers R1 and R2 are EIGRP neighbors. R1 has been configured with the eigrp stub connected command. Which of the following is true as a result？（）AR1 can learn EIGRP routes from R2, but R2 cannot learn EIGRP routes from R1BR1 can send IP packets to R2, but R2 cannot send IP packets to R1CR2 no longer learns EIGRP routes from R1 for routes not connected to R1DR1 no longer replies to R2's Query messagesER2n o longer sends to R1 Query messages
单选题A company uses Routers R1 and R2 to connect to ISP1 and ISP2, respectively, with Routers I1 and I2 used at the ISPs. R1 peers with I1 and R2; R2 peers with I2 and R1. Assuming as many default s ettings as possible are used on all four routers, which of the following is true about the next - hop IP address for routes R1 learns over its iBGP connection to R2?（）AThe next hop is I2's BGP RIDBThe next hop is I2's IP address used on the R2 - I2 neigh bor relationshipCThe next hop is R2's BGP RIDDThe next hop is R2's IP address used on the R1 - R2 neighbor relationship
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?（）AThe show ip ospf neighbor command on R1 lists the revised Hello timerBThe show ip ospf interfac e brief command on R1 lists the revised Hello timerCThe R1 - R2 neighborship fails due to Hello timer mismatcHDThe show ip ospf interface command on R1 lists the revised Hello timer
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
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?（）AThe show ip ospf neighbors command lists two neighbors off Fa0/0.BThe show ip ospf neighbors command lists four neighbors off Fa0/0.CThe show ip ospf neighbors command lists two neighbors off Fa0/0 in the FULL state.DThe show ip ospf neighbors command lists two neighbors off Fa0/0 in the DISCO state.
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?（）Aip ospf authentication nullBip ospf authentication message - digestCip ospf authentication -key whatever- it - isDip ospf message - digest - key 1 md5 whatever - it - isEip ospf md5 1 key whatever - it - is
多选题R1 and R2 exchange HSRP between each other in the Company network. In which three HSRP states do routers send hello messages？（）ALearnBSpeakCStandbyDListenEActiveFRemove