Refer to the exhibit, which shows a partial enterprise network. An administrator would like the area 0.0.0.0 to detect the external network. What must the administrator configure?
A.
Enable RIP redistribution on FortiGate B.
B.
Configure a distribute-route-map-in on FortiGate B.
C.
Configure a virtual link between FortiGate A and B.
D.
Set the area 0.0.0.l type to stub on FortiGate A and B.
A. Correct -> To make RIP-learned routes available in OSPF, FortiGate B must redistribute RIP into OSPF. Without redistribution, OSPF has no knowledge of the RIP routes.
B. Wrong -> This would filter incoming routes, not redistribute them. It does not solve the problem directly.
C. Wrong -> Not required here. Area 0.0.0.0 already connects to area 0.0.0.1 through FortiGate A → B. Virtual links are used when a non-backbone area needs to connect to another non-backbone area via a transit area, but that’s not the case here.
D. Wrong -> Stub areas do not allow external (Type 5) LSAs, which is what RIP routes (after redistribution) would be. This would actually prevent RIP routes from propagating.
C is correct
In the case an NSSA area, you can integrate it into OSPF network with a virtual link. When you configure a virtual link on both routers, you allow a remote area to virtually connect directly to the backbone area
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