You notice an inconsistency between the routing table and the OSPF database, as shown in the exhibit. What are two reasons for this behavior? (Choose two.)
A.
The LSA is a Type 4 LSA.
B.
An OSPF export policy is being applied to the route.
C.
An OSPF import policy is being applied to the route.
OSPF import policy allows you to prevent external routes from being added to the routing tables of OSPF neighbors. The import policy does not impact the OSPF database. This means that the import policy has no impact on the link-state advertisements. The filtering is done only on external routes in OSPF.
C&D
Should be C&D. Export policy lists the name of the routing policy to be evaluated when routes are being exported from the routing table into OSPF. This rules out B because with prefix absent in route table, OSPF LSDB could not be populated.
C and D.
As this is an external route, LSA 5 is used for this. LSA 4 is used for discovering the ASBR.
Also, as the route is in the RIB in, but not in the routing table, this has to be done by a import policy.
you can have import policy in ospf, it doesn't impact the LSDB, but the routing table and it works only for external routes, as in this case. It's definitely C and D
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/ospf-routing-policy.html
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