After the network has converged, what type of messaging, if any, occurs between R3 and R4?

The correct answer is B. Hellos are sent every 10 seconds.. After OSPF convergence, routers do NOT stop communicating. They continue exchanging (B) Hello packets every 10 seconds (on broadcast and point-to-point links) to maintain neighbor adjacencies and detect link failures. If a router misses a neighbor's hellos for the dead interval (

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Question

After the network has converged, what type of messaging, if any, occurs between R3 and R4?

Options

ANo messages are exchanged.
BHellos are sent every 10 seconds.
CThe full database from each router is sent every 30 seconds.
DThe routing table from each router is sent every 60 seconds.

How the community answered

(61 responses)

A
5% (3)
B
90% (55)
C
2% (1)
D
3% (2)

Explanation

After OSPF convergence, routers do NOT stop communicating. They continue exchanging (B) Hello packets every 10 seconds (on broadcast and point-to-point links) to maintain neighbor adjacencies and detect link failures. If a router misses a neighbor's hellos for the dead interval (typically 40 seconds, or 4x the hello interval), it declares the neighbor down and begins reconvergence. The full LSA database (C) is only exchanged during initial adjacency formation, not periodically after convergence. Routing tables (D) are not directly exchanged in OSPF - topology data via LSAs is, and each router independently calculates its own routing table using SPF.

Topics

#OSPF hello packets#post-convergence#neighbor adjacency#dead interval

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