Which of the following is true about an OSPF area border router (ABR)?() A. The ABR must have multiple interfaces connected to the backbone areAB. An ABR is a router with two interfaces, each connected to a different nonbackbone areAC. The only requirement to be considered an ABR is at least one interface connected to the backbone areAD. An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
Which of the following is true about an OSPF area border router (ABR)?()
A. The ABR must have multiple interfaces connected to the backbone areA
B. An ABR is a router with two interfaces, each connected to a different nonbackbone areA
C. The only requirement to be considered an ABR is at least one interface connected to the backbone areA
D. An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
相关考题：
The following output exists on Router R1, a router internal to area 1. What can you d etermine as true from the output of the show ip ospf database summary command?() A. The LSA was created by an ABR due to an area range command.B. The LSA was created by an ASBR due to a summary - address command.C. If cr eated by an area range command, the best metric for a subordinate subnet on that ABR must have been 11.D. None of the other answers is correct.
Refer to the exhibit. Router C was configured so that it could form an adja cency with three OSPF neighbors, one connected to each of its three physical interfaces. Which statement is correct about router C?（）A. It is configured and functioning correctly as an OSPF internal router.B. It is configured and functioning correc tly as an ABR attached to stub area 4.C. It is configured and functioning correctly as an ASBR attached to external area 4.D. It is configured and functioning correctly as an ABR attached to totally stubby area 4.E. It is not configured correctly to function as specified.
To make OSPF area 4 totally stubby, the following command was issued on the ABR in router configuration mode: area 4 stub.Which two things need to be done to finish making area 4 a totally stubby area?（）A. Apply the area 4 stub command to all routers in the areaB. On the ABR, use the area 4 stub command with the no - summary keywordC. On the ABR, specify a default cost for the area with the area default - cost commandD. On the ABR, use the default - information originate command to inject a default route into area 4E. Use the auto - cost command on each router in the area to automatically determine the cost to other OSPF areas
Refer to the exhibit. The partial configuration for an OSPF ASBR and an Area 0 ABR is shown. Assume the OSPF configurations throughout the network are operable. Which statement about these configurations is true? （）A. The ASBR route - maps are basically useless, because there are no deny prefix - lists.B. LSA Type 5s wil l not be received by the ABR from the ASBR.C. The OSPF backbone will not learn any RFC 1918 addresses.D. The matched prefix - list addresses will be given a metric of 255, which is essentially unreachable.
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router?() A. A virtual link to area 0.B. OSPF summarization command.C. default - cost extension to the area command.D. no - summary extension to the area stub comm and.E. None of the other alternatives apply
Refer to the diagram. Which OSPF configuration command is required to configure Area 3 a s atotally stubby area?() A. On the ABR router ospf 10 area 3 stubB. On all Area 3 routers router ospf 10 area 3 stubC. On all Area 3 routers router ospf 10 area 3 stub no - summaryD. On the ABR router ospf 10 area 3 nssaE. On the ABR rou ter ospf 10 area 3 stub no - summary
Which is true about OSPF router－id?() A.It is used for type 1 router LSAB.Highest IP address of the loopback is usedC.router-id needs to be matched on ospf neighborsD.router-id is 16 bit
Which is true about OSPF router-id?（）A、It is used for type 1 router LSAB、Highest IP address of the loopback is usedC、router-id needs to be matched on ospf neighborsD、router-id is 16 bit
Which statement about OSPF ASBR summary LSA is true？（）A、It is generated by an ASBR and indicates the reachability to an ABR located in another area.B、It is generated by ABR and indicates the reachability to an ASBR located in another AS.C、It is generated by ABR and indicates reachability to itself.D、It is generated by ABR and indicates the reachability to an ASBR located in another area.E、It is generated by ASBR and indicates the reachability to an ABR.
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）A、A virtual link to area 0.B、OSPF summarization command.C、default - cost extension to the area command.D、no - summary extension to the area stub comm and.E、None of the other alternatives apply
Which description regarding OSPF Network LSAs is correct?（）A、They are originated by Area Border Router and are sent into a single area to advertise an Autonomous System Border Router.B、They are originat ed by Area Border Routers and are sent into a single area to advertise destinations outside that area.C、They are originated by the DR on every multi - access network. They include all attached routers including the DR itself.D、They are originated by every router in the OPSF network. They include all routers on the link, interfaces, the cost of the link, and any known neighbor on the link.
Which three statements about OSPF areas are true?（）A、Areas introduce a boundary on the link - state updates.B、Areas are logical definitions specific to any given router.C、All routers within an area have the exact link - state database.D、The calculation of the Dijkstra algorithm on a router is limited to changes within an area.E、The area designated router will always have a priority of 0.
Which statement about OSPF authentication is true？（）A、To enable OSPF authentication in a network， OSPF area 0 authentications must be enabled firstB、The payload of OSPF version 3 packets contains no authentication informationC、OSPF version 3 supports Advanced Encryption StandardD、OSPF version 3 uses router ID as a key to encrypt OSPF hello packetsE、OSPF MD5 authentication uses TCP， and Plan Test authentication uses UDP
Which statement is true about the frequency of OSPF LSA transmissions？（）A、 They are configured per OSPF area.B、 They are configured per virtual router.C、 They are configured per OSPF process.D、 They are configured per OSPF interface.
Area Border Router （ABR） is a router located on the border of one or more OSPF areas that connect those areas to the backbone network. An ABR will inject a default route into which two types of areas？（）A、Area 0B、NSSAC、Totally stubbyD、Stub
Which of the following OSPF commands, when used together, will put the network 192.168.10.0/24 into OSPF area 0?（）A、Router(config-router)# network 192.168.10.0 0.0.0.255 0B、Router(config-router)# network 192.168.10.0 0.0.0.255 area 0C、Router(config-router)# network 192.168.10.0 255.255.255.0 area 0D、Router(config)# router ospf 0E、Router(config)# router ospf 1
Into which two types of areas would an area border router (ABR) inject a default route?（）A、stubB、the autonomous system of an exte rior gateway protocol (EGP)C、NSSAD、totally stubbyE、the autonomous system of a different interior gateway protocol (IGP)F、area 0
Which of the following is true about an OSPF area border router (ABR)?（）A、The ABR must have multiple interfaces connected to the backbone areAB、An ABR is a router with two interfaces, each connected to a different nonbackbone areAC、The only requirement to be considered an ABR is at least one interface connected to the backbone areAD、An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
多选题Which of the following OSPF commands, when used together, will put the network 192.168.10.0/24 into OSPF area 0?（）ARouter(config-router)# network 192.168.10.0 0.0.0.255 0BRouter(config-router)# network 192.168.10.0 0.0.0.255 area 0CRouter(config-router)# network 192.168.10.0 255.255.255.0 area 0DRouter(config)# router ospf 0ERouter(config)# router ospf 1
多选题Which three statements about OSPF areas are true?（）AAreas introduce a boundary on the link - state updates.BAreas are logical definitions specific to any given router.CAll routers within an area have the exact link - state database.DThe calculation of the Dijkstra algorithm on a router is limited to changes within an area.EThe area designated router will always have a priority of 0.
单选题Which description regarding OSPF Network LSAs is correct?（）AThey are originated by Area Border Router and are sent into a single area to advertise an Autonomous System Border Router.BThey are originat ed by Area Border Routers and are sent into a single area to advertise destinations outside that area.CThey are originated by the DR on every multi - access network. They include all attached routers including the DR itself.DThey are originated by every router in the OPSF network. They include all routers on the link, interfaces, the cost of the link, and any known neighbor on the link.
单选题Which statement about OSPF ASBR summary LSA is true？（）AIt is generated by an ASBR and indicates the reachability to an ABR located in another area.BIt is generated by ABR and indicates the reachability to an ASBR located in another AS.CIt is generated by ABR and indicates reachability to itself.DIt is generated by ABR and indicates the reachability to an ASBR located in another area.EIt is generated by ASBR and indicates the reachability to an ABR.
多选题To make OSPF area 4 totally stubby, the following command was issued on the ABR in router configuration mode: area 4 stub.Which two things need to be done to finish making area 4 a totally stubby area?（）AApply the area 4 stub command to all routers in the areaBOn the ABR, use the area 4 stub command with the no - summary keywordCOn the ABR, specify a default cost for the area with the area default - cost commandDOn the ABR, use the default - information originate command to inject a default route into area 4EUse the auto - cost command on each router in the area to automatically determine the cost to other OSPF areas
单选题Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）AA virtual link to area 0.BOSPF summarization command.Cdefault - cost extension to the area command.Dno - summary extension to the area stub comm and.ENone of the other alternatives apply
单选题In JUNOS software, which statement is true regarding the OSPF advertisement of the loopback IP address on the ABR?（）AWhen Area 0 is active, the loopback interface must be configured in OSPF for it to be advertised.BWhen Area 0 is active, the loopback address is automatically advertised into other areas.CWhen Area 0 is active, the OSPF router-id must match the loopback address for the loopback address to be advertised.DWhen Area 0 is active, the router-id must be configured for the loopback address to be advertised.
单选题Which of the following is true about an OSPF area border router (ABR)?（）AThe ABR must have multiple interfaces connected to the backbone areABAn ABR is a router with two interfaces, each connected to a different nonbackbone areACThe only requirement to be considered an ABR is at least one interface connected to the backbone areADAn ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
单选题Which statement is true about the frequency of OSPF LSA transmissions？（）A They are configured per OSPF area.B They are configured per virtual router.C They are configured per OSPF process.D They are configured per OSPF interface.
多选题Area Border Router （ABR） is a router located on the border of one or more OSPF areas that connect those areas to the backbone network. An ABR will inject a default route into which two types of areas？（）AArea 0BNSSACTotally stubbyDStub