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单选题
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.
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更多 “单选题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.” 相关考题
考题
OSPFv3 interarea－prefix－LSAs are most similar to which OSPFv2 LSA type?()
A. Type 7 LSAsB. Type 4 summary LSAsC. Type 3 summary LSAsD. Type 5 AS-external LSAs
考题
Which router translates the Type 7 LSAs into Type 5 LSAs, according to RFC 1587 (OSPF NSSAOption) in an OSPF NSSA with more than one ABR?()
A. The router receiving the route translates the Type 7 LSA into a Type 5 LSA.B. The ABR with the lowest router ID translates all Type 7 LSAs into Type 5 LSAs.C. The ABR with the highest router ID translates all Type 7 LSAs into Type 5 LSAs.D. All ABRs translate the Type 7 LSAs into Type 5 LSAs depending on which one has the lowest cost to the route.
考题
Which of the following is true about routers internal to a totally NSSA area?()
A. Routers cannot redistribute external routes into the area.B. Routers should have zero Type 3 LSAs in their LSDBs.C. Routers should have zero Type 5 LSAs in their LSDBs.D. Routers should learn default routes from the ABRs attached to the area.
考题
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
考题
Refer to the exhibit. OSPF is running throughout the network. You want to minimize the propagation of LSAs into and out of A rea 1. Which OSPF feature would best achieve this goal? ()
A. stubB. totally stubbyC. NSSAD. totally NSSA
考题
Which show command will display only the Type 5 LSAs in the OSPF topology database?()
A. show ip ospf database externalB. show ip ospf database nssa - externalC. show ip route ospfD. show ip ospf datab ase summaryE. show ip route
考题
When verifying the OSPF link state database, which type of LSAs should you expect to see within the different OS PF area types?（）A、All OSPF routers in stubby areas can have type 3 LSAs in their database.B、All OSPF routers in stubby areas can have type 7 LSAs in their database.C、All OSPF routers in totally stubby areas can have type 3 LSAs in their database.D、All OSPF routers in totally stubby areas can have type 7 LSAs in their database.E、All OSPF routers in NSSA areas can have type 3 LSAs in their database.F、All OSPF routers in NSSA areas can have type 7 LSAs in their database.
考题
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
考题
OSPF stub areas are an important tool for the Network designer； which of the following two shouldbe considered when utilizing OSPF stub areas？ （）A、 OSPF stub areas increase the size of the LSDB with the addition of Type 3 and 5 LSAsB、 OSPF not so stubby areas are particularly useful as a simpler form of summarizationC、 OSPF stub areas are always insulated from external changesD、 OSPF totally stubby cannot distinguish among ABRs for the best route to destinationsoutsidethe areasE、 OSPF stub areas can distinguish among ASBRs for destinations that are external to the OSPFdomain
考题
Which one of these statements is true of OSPF type 5 LSAs？ （）A、 They are used to summarize area routes to other areas.B、 They are used in not-so-stubby areas to propagate external routes.C、 They are used to notify areas of the ASBR.D、 They are flooded to all areas except stub areas （external route）.
考题
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.
考题
The maximum number of routers per OSPF area typically depends on which three factors?（）A、the kind of OSPF areas being implementedB、the number of external LSAs in the networkC、the number of DRs and BDRs in the areasD、the number of virtual links in the areasE、how well the areas can be summarizedF、the use of LSA filters
考题
Which three statements about OSPF partial SPF are true？（）A、If it is triggered by Type 4， all Type 4 LSAs that announce a certain ASBR and all Type 5 and 7 LSAs are processedB、If it is triggered by Types 5 and 7， all Type 5 and 7 LSAs that contribute to a certain destination are processed.C、If it is triggered by Type 2， all Type 2 LSAs that contribute to a certain destination are processed.D、If it is triggered by the change of Type 3， 4， 5， and 7 LSAs.E、If it is triggered by the change of Type 2， 3， 5， and 7 LSAs
考题
Which show command will display only the Type 5 LSAs in the OSPF topology database？（）A、show ip ospf database externalB、show ip ospf database nssa - externalC、show ip route ospfD、show ip ospf datab ase summaryE、show ip route
考题
OSPFv3 interarea-prefix-LSAs are most similar to which OSPFv2 LSA type?（）A、Type 7 LSAsB、Type 4 summary LSAsC、Type 3 summary LSAsD、Type 5 AS-external LSAs
考题
单选题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
考题
多选题OSPF stub areas are an important tool for the Network designer； which of the following two shouldbe considered when utilizing OSPF stub areas？ （）AOSPF stub areas increase the size of the LSDB with the addition of Type 3 and 5 LSAsBOSPF not so stubby areas are particularly useful as a simpler form of summarizationCOSPF stub areas are always insulated from external changesDOSPF totally stubby cannot distinguish among ABRs for the best route to destinationsoutsidethe areasEOSPF stub areas can distinguish among ASBRs for destinations that are external to the OSPFdomain
考题
单选题OSPFv3 interarea-prefix-LSAs are most similar to which OSPFv2 LSA type?（）A
Type 7 LSAsB
Type 4 summary LSAsC
Type 3 summary LSAsD
Type 5 AS-external LSAs
考题
多选题Which three statements about OSPF partial SPF are true？（）AIf it is triggered by Type 4， all Type 4 LSAs that announce a certain ASBR and all Type 5 and 7 LSAs are processedBIf it is triggered by Types 5 and 7， all Type 5 and 7 LSAs that contribute to a certain destination are processed.CIf it is triggered by Type 2， all Type 2 LSAs that contribute to a certain destination are processed.DIf it is triggered by the change of Type 3， 4， 5， and 7 LSAs.EIf it is triggered by the change of Type 2， 3， 5， and 7 LSAs
考题
单选题Which show command will display only the Type 5 LSAs in the OSPF topology database？（）A
show ip ospf database externalB
show ip ospf database nssa - externalC
show ip route ospfD
show ip ospf datab ase summaryE
show ip route
考题
多选题Which of the following is true about routers internal to a totally NSSA area?（）ARouters cannot redistribute external routes into the area.BRouters should have zero Type 3 LSAs in their LSDBs.CRouters should have zero Type 5 LSAs in their LSDBs.DRouters should learn default routes from the ABRs attached to the area.
考题
多选题You want to limit the number of Type 7 LSAs to be converted into Type 5 LSAs at an appropriate ARB. Which two commands should you use from the [edit] hierarchy level within the JUNOS software configuration mode？（）Aset protocols ospf area-range network/mask-lengthBset protocols ospf area area-id nssa area-range network/mask-lengthCset protocols ospf area area-id area-range network/mask-length restrictDset protocols ospf area area-id nssa area-range network/mask-length restrict
考题
单选题Which one of these statements is true of OSPF type 5 LSAs？ （）A
They are used to summarize area routes to other areas.B
They are used in not-so-stubby areas to propagate external routes.C
They are used to notify areas of the ASBR.D
They are flooded to all areas except stub areas （external route）.
考题
多选题The maximum number of routers per OSPF area typically depends on which three factors?（）Athe kind of OSPF areas being implementedBthe number of external LSAs in the networkCthe number of DRs and BDRs in the areasDthe number of virtual links in the areasEhow well the areas can be summarizedFthe use of LSA filters
考题
单选题Which router translates the Type 7 LSAs into Type 5 LSAs, according to RFC 1587 (OSPF NSSAOption) in an OSPF NSSA with more than one ABR?（）A
The router receiving the route translates the Type 7 LSA into a Type 5 LSA.B
The ABR with the lowest router ID translates all Type 7 LSAs into Type 5 LSAs.C
The ABR with the highest router ID translates all Type 7 LSAs into Type 5 LSAs.D
All ABRs translate the Type 7 LSAs into Type 5 LSAs depending on which one has the lowest cost to the route.
考题
单选题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
考题
单选题Which one of these statements is true of OSPF type 5 LSAs？（）A
They are used to summarize area routes to other areas.B
They are used in not-so-stubby areas to propagate external routes.C
They are used to notify areas of the ASBR.D
They are flooded to all areas except stub areas （external route）.
考题
多选题You want to limit the number of Type 7 LSAs to be converted into Type 5 LSAs at an appropriateABR. Which two commands should you use from the [edit] hierarchy level within JUNOS configuration mode?（）Aset protocols ospf area-range network/mask-lengthBset protocols ospf area area-id nssa area-range network/mask-lengthCset protocols ospf area area-id area-range network/mask-length restrictDset protocols ospf area area-id nssa area-range network/mask-length restrict
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