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What is a characteristic of a single-area OSPF network?

  • All routers have the same routing table.
  • All routers have the same neighbor table.
  • All routers share a common forwarding database.
  • All routers are in the backbone area.
Explanation & Hint:

In a single-area OSPF (Open Shortest Path First) network, a characteristic feature is that all routers are in the backbone area.

The backbone area in OSPF is also known as Area 0. In a single-area OSPF network, all routers belong to this Area 0. This is a defining characteristic of such a network because OSPF mandates that all areas must connect to the backbone area, and in a single-area network, there are no other areas.

The other statements are not accurate characteristics:

  • All routers have the same routing table: While the routers in a single OSPF area do learn about the same networks, their routing tables may not be identical. The routing table of a router includes routes to each network along with the next hop to reach that network, which can differ from router to router depending on their location in the network.
  • All routers have the same neighbor table: Routers in a single area do learn about each other, but their neighbor tables will differ. The neighbor table on an OSPF router lists only those routers to which it has formed an OSPF adjacency, which varies based on the router’s direct connections.
  • All routers share a common forwarding database: While it’s true that all routers in an OSPF area share a common link-state database (not forwarding database), this statement is a bit misleading. The link-state database is used to compute the routing table, but the term “forwarding database” is not typically used in the context of OSPF.

For more Questions and Answers:

CCNA 3 v7 – ENSA v7.02 Final Exam Answers Full 100%

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