单选题Which statement best describes OSPF external LSAs （type 5）？（）AOSPF external LSAs are automatically flooded into all OSPF areas, unlike type 7 LSAs, which require that redistribution be configured.BExternal LSAs (type 5) are automatically changed to type 1 LSAs at ASBRs.CType 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.DExternal network LSAs (type 5) redistributed from other routing protocols into OSPF are not permitted to flood into a stub area
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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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.
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
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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