The OSPF External LSA for prefix x.x.x.x exists in the OSPF database， but the prefix is not installed in therouting table. Which are possible explanations？（）A、Inbound distribute-list is configured under the ospf process and it is denying x.x.x.xB、ASBR origination the LSA is not reachableC、Route to the Forwarding Address in not an internal OSPF routeD、Route to the Forwarding Address is an internal OSPF routeE、Route to the ASBR does not follow the same path as the one to the Forwarding Address
The OSPF External LSA for prefix x.x.x.x exists in the OSPF database， but the prefix is not installed in therouting table. Which are possible explanations？（）
- A、Inbound distribute-list is configured under the ospf process and it is denying x.x.x.x
- B、ASBR origination the LSA is not reachable
- C、Route to the Forwarding Address in not an internal OSPF route
- D、Route to the Forwarding Address is an internal OSPF route
- E、Route to the ASBR does not follow the same path as the one to the Forwarding Address
相关考题：
Use the same scenario as the previous question, w ith one changE.Instead of the distribute-list prefix question in command configured on R1,R1‘s OSPF process has an area 1 filter-list prefix question in commandconfigured. Again assuming that the subnets listed in the answers actually exist in area 0.Which of the following occurs on router R1?（）R1sh ip prefix - listip prefix - list question: 4 entriesseq 5 deny 10.1.2.0/24 ge 25 le 27seq 15 deny 10.2.0.0/16 ge 30 le 30seq 20 permit 0.0.0.0/0 le 32A. R1 will not create/flood a type 3 LSA for su bnet 10.1.2.0/26 into area 1B. R1 will not create/flood a Type 3 LSA for subnet 10.1.2.0/24 into area 1C. R1 will not have an OSPF route for subnet 10.1.2.0/26 in its IP routing tablED. R1 will not have an OSPF route for subnet 10.1.2.0/24 in its IP routing tablE
Refer to the exhibit. OSPF is configured on all routers in the network. Area 5 is configured as an NSSA areA. The RIPv2 routes are redistributed into the OSPF domain on router R5. What two types of LSAs will be originated by router R5?（）A. type 1 Router LSAB. type 2 Network LSAC. type 3 Network Summary LSAD. type 4 ASBR Summary LSAE. type 5 AS External LSAF. type 7 NSSA External LSA
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.
The administrator wants to verify the current state of the OSPF database loading process. Which show command should the administrator use?() A. show ip ospf [process - id] interfaceB. show ip ospf neighborC. show ip ospf [process - id]D. show ip ospf [process - id area - id] database
In IPv6, the interfaces running OSPF can be configured with multiple ad dress prefixes.Which statement is true about the IPv6 addresses that can be included into the OSPF process? () A. Specific addresses can be selected using a prefix list.B. Specific addresses can be selected using a route map.C. Specific addresses cann ot be selected for importation into the OSPF process.D. Specific addresses can be selected using an ACL.
What does the command clear ipv6 ospf process accomplish?() A. The shortest path first (SPF) algorithm is performed on the LSA database.B. The OSPF adjacencies are cleared and initiated again.C. The OSPF database is repopulated. Then the shortest path first (SPF) algorithm is performed.D. The route table is cleared. Then the OSPF neighbors are reformed.
Which command is used to display the collection of OSPF link states?() A. show ip ospf lsa databaseB. show ip ospf link-stateC. show ip ospf neighborsD. show ip ospf database
Which command is used to display the collection of OSPF link states?（）A、show ip ospf lsa databaseB、show ip ospf link-stateC、show ip ospf neighborsD、show ip ospf database
Which information will the Cisco IOS command show ip ospf rib display？（）A、only the local OSPF routesB、only the OSPF routes installed in the routing tableC、only the remotely learned OSPF routesD、all the OSPF routes from the OSPF database that are eligible to be put in the routing table
You are troubleshooting an OSPF problem where external routes are not showing up in the OSPF database. Which two options a re valid checks that should be performed first to verify proper OSPF operation?（）A、Are the ASBRs trying to redistribute the external routes into a totally stubby area?B、Are the ABRs configured with stubby areas?C、Is the subnets keyword being used with the redistribution command?D、Is backbone area (area 0) contiguous?E、Is the CPU utilization of the routers high?
Your network trainee asks you, in the context of IPv6 and OSPF, what best des cribes a type 9 LSA? What should you tell her?（）A、Link LSAB、Interarea prefix LSA for ABRsC、Router LSAD、Switch LSAE、Intra - area prefix LSAF、None of the above
The administrator wants to verify the current state of the OSPF database loading process. Which show command should the administrator use?（）A、show ip ospf [process - id] interfaceB、show ip ospf neighborC、show ip ospf [process - id]D、show ip ospf [process - id area - id] database
What does the command clear ipv6 ospf process accomplish?（）A、The shortest path first (SPF) algorithm is performed on the LSA database.B、The OSPF adjacencies are cleared and initiated again.C、The OSPF database is repopulated. Then the shortest path first (SPF) algorithm is performed.D、The route table is cleared. Then the OSPF neighbors are reformed.
The show ip ospf database external command displays information about which OSPF LSA type？（）A、LSA type 1B、LSA type 2C、LSA type 7D、LSA type 3E、LSA type 9F、LSA type 5
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.
Which statement best describes OSPF external LSAs （type 5）？（）A、OSPF external LSAs are automatically flooded into all OSPF areas， unlike type 7 LSAs， which require that redistribution be configured.B、External LSAs （type 5） are automatically changed to type 1 LSAs at ASBRs.C、Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.D、External network LSAs （type 5） redistributed from other routing protocols into OSPF are not permitted to flood into a stub area.
Which command is used to display the collection of OSPF link states？（）A、show ip ospf lsa database（not A）B、show ip ospf link-stateC、show ip ospf neighborsD、show ip ospf database
Which routers must be configured with the same authentication string when configuring OSPFauthentication?（）A、all routers on a linkB、all routers in an areaC、all external OSPF peersD、all routers in an OSPF domain
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The OSPF External LSA for prefix x.x.x.x exists in the OSPF database， but the prefix is not installed in therouting table. Which are possible explanations？（）AInbound distribute-list is configured under the ospf process and it is denying x.x.x.xBASBR origination the LSA is not reachableCRoute to the Forwarding Address in not an internal OSPF routeDRoute to the Forwarding Address is an internal OSPF routeERoute to the ASBR does not follow the same path as the one to the Forwarding Address
单选题What does the command clear ipv6 ospf process accomplish?（）AThe shortest path first (SPF) algorithm is performed on the LSA database.BThe OSPF adjacencies are cleared and initiated again.CThe OSPF database is repopulated. Then the shortest path first (SPF) algorithm is performed.DThe route table is cleared. Then the OSPF neighbors are reformed.
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Refer to the exhibit. Which three statements accurately describe the result of applying the exhibited route map？（）AThe map prohibits the redistribution of all type 2 external OSPF routes with tag 6 setBThe map prohibits the redistribution of all type 2 external OSPF routesCThe map redistributes into EIGRP all routes that match the pfx prefix list and the five metric values40000， 1000， 255， 1， and 1500DThe map prohibits the redistribution of all external OSPF routes with tag 6 setEAll routes that do no match clauses 10 and 20 of the route map are redistributed with their tags set to 8FThe map permits the redistribution of all type 1 external OSPF routes
单选题Your network trainee asks you, in the context of IPv6 and OSPF, what best des cribes a type 9 LSA? What should you tell her?（）ALink LSABInterarea prefix LSA for ABRsCRouter LSADSwitch LSAEIntra - area prefix LSAFNone of the above
单选题The following command output was gathered from Router R1, an ABR between areas 0 (backbone) and area 1. In this internetwork, area 0 contains all the subnets of cla ss A network 10.0.0.0. R1's OSPF process has a distribute - list prefix question in command configured. Assuming the subnets listed in the answers actually exist in area 0. Which of the following occurs on router R1?（） R1#sh ip prefix - list ip prefix - list question: 4 entries seq 5 deny 10.1.2.0/24 ge 25 le 27 seq 15 deny 10.2.0.0/16 ge 30 le 30 seq 20 permit 0.0.0.0/0 le 32AR1 will not create/flood a type 3 LSA for subnet 10.1.2.0/26 into area 1BR1 will not create/flood a Type 3 LSA for subnet 1 0.1.2.0/24 into area 1CR1 will not have an OSPF route for subnet 10.1.2.0/26 in its IP routing tablEDR1 will not have an OSPF route for subnet 10.1.2.0/24 in its IP routing tablE
单选题The show ip ospf database external command displays information about which OSPF LSA type？（）ALSA type 1BLSA type 2CLSA type 7DLSA type 3ELSA type 9FLSA type 5