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NSE 6 - Network Security 7.6 Support Engineer Materials - Question #102 Discussion
Community Explanations & Comments (4)
Adam
9 months ago
Selected: B
A is wrong because we only have the default route to match 8.8.8.8 which is a last resort by nature
C is wrong because we received the route in OSPF database
Under "config router ospf", we can configure:
-> set distribute-route-map-in <Route Map which references ACL or Prefix List>
-> set distribute-list-in <ACL or Prefix List>
I see both B and D are correct, so I'm not sure
C is wrong because we received the route in OSPF database
Under "config router ospf", we can configure:
-> set distribute-route-map-in <Route Map which references ACL or Prefix List>
-> set distribute-list-in <ACL or Prefix List>
I see both B and D are correct, so I'm not sure
James
9 months ago
Selected: D
If the route was denied by prefix list, it might not be even showing up on the LSDB. Distribution lists filter routes before they are installed into the routing table, while still allowing them to exist in the LSDB. Hence, the correct answer should be D.
Mehdi
8 months ago
Selected: A
B & D is incorrect : These filter inbound acceptance (prefix-list in route-map-in) or outbound advertisement . If denied inbound, the route wouldn't appear in the OSPF database at all but it does (LSA present).
Common in FortiGate: if a static default exists (often for Internet outbound), specific external OSPF routes may not install if they conflict or if the ASBR path relies on that default (potential recursion issue), but the primary reason for non-installation when in LSDB is a better/preferred route already winning in the RIB.
Common in FortiGate: if a static default exists (often for Internet outbound), specific external OSPF routes may not install if they conflict or if the ASBR path relies on that default (potential recursion issue), but the primary reason for non-installation when in LSDB is a better/preferred route already winning in the RIB.
Anonymous User
6 months ago
Selected: D
Prefix lists are typically used to filter what is advertised to or received from neighbors (affecting the database).
Distribution lists are the specific command structure used to filter the injection of database entries into the local routing table.
Distribution lists are the specific command structure used to filter the injection of database entries into the local routing table.
Refer to the exhibits - An administrator is expecting to receive advertised route 8.8.8.8/32 from FGT-A. On FGT-B, they confirm that the route is being advertised and received, however, the route is not being injected into the routing table. What is the most likely cause of this issue? (Choose one answer)
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